[
  {
    "slug": "day-length-from-latitude-and-declination",
    "title": "Day length from latitude and solar declination",
    "deck_category": "astronomy",
    "file": "cards/day-length-from-latitude-and-declination.card.json",
    "card_sha256": "3a87e1b88202654e31a856d1e7c354e3b26d7b3ed54936cd9102b92b311d143e",
    "method_sha256": "91d37a59633272b64f87b69a2376436373f6c95074886b536dd4220b53e41742",
    "address": "ec2aa4b27117b3fe32813660477a91f5"
  },
  {
    "slug": "great-circle-distance-haversine",
    "title": "Great-circle distance (haversine)",
    "deck_category": "astronomy",
    "file": "cards/great-circle-distance-haversine.card.json",
    "card_sha256": "7f62eddee1106a8aed65c9e6a3efa5685702080b857e7a8372394f1a8d40745a",
    "method_sha256": "6b1abc8a8bc4026026102cdce0324710aa8d59f677a951d587bf9b2fa869a741",
    "address": "a9d2c83210fe4fc84ff6c041ee7b2804"
  },
  {
    "slug": "initial-bearing-between-points",
    "title": "Initial bearing between two points",
    "deck_category": "astronomy",
    "file": "cards/initial-bearing-between-points.card.json",
    "card_sha256": "2e6b0f0a0203938ad0d2f0174bc1a8c52f9b1e57c0d42e45962eda117a957834",
    "method_sha256": "e3b64c85d971f395275b0a0fe8b8a7376170a6e4c9c87a05184c6a6ca420694a",
    "address": "007fa1b8a433d439095d9ab9e351bea2"
  },
  {
    "slug": "moon-phase-by-synodic-month",
    "title": "Moon phase from a mean synodic month",
    "deck_category": "astronomy",
    "file": "cards/moon-phase-by-synodic-month.card.json",
    "card_sha256": "2fb17a68f939b40bc6eb492d13c83c54c0455d99f6a7a96b958ec06b86ac4aa4",
    "method_sha256": "a60d9de6cceabb46571be2a6d470c8bfcf15d791d2bb60161280f5a58cf2a118",
    "address": "6baaaf7a65c3ef5efad5dc1728a050e7"
  },
  {
    "slug": "sun-declination-by-day-of-year",
    "title": "Solar declination from day of year",
    "deck_category": "astronomy",
    "file": "cards/sun-declination-by-day-of-year.card.json",
    "card_sha256": "ef18d20755b7ba6a0feba5a12ccba4a96a30f9982440db54adb3bc991c0796cd",
    "method_sha256": "a6af02cd8d353d406268573d578db6f231daea12f6f34710c0875bedcec108c3",
    "address": "50c3bad5c412f4d5e24dc6aae5db9a98"
  },
  {
    "slug": "tide-height-rule-of-twelfths",
    "title": "Tide height by the rule of twelfths",
    "deck_category": "astronomy",
    "file": "cards/tide-height-rule-of-twelfths.card.json",
    "card_sha256": "7c7ecea1468d4e8b37089aa340e1e0924315acccf9ed51aaf4186d7c10fbda38",
    "method_sha256": "243f8e9073917f361579c536a641327eea419e04520918908a96afeea1f4d09f",
    "address": "40dc45ca1286d07c8200f3fbd0b8f859"
  },
  {
    "slug": "bakers-percentage",
    "title": "Baker's percentage",
    "deck_category": "cooking",
    "file": "cards/bakers-percentage.card.json",
    "card_sha256": "b7f064c4e0f60f93d8c3512420bec4dc0248c9ab01977456e4a2cc4ffa9fc67a",
    "method_sha256": "f0e9b59b9cc28bce647bc809fce3c4ae0f90f47bb52435c1b2913eb2646e907d",
    "address": "20acd3875e2da997387e55e0b97da7ee"
  },
  {
    "slug": "brine-solution-by-percent",
    "title": "Brine solution by salt percent",
    "deck_category": "cooking",
    "file": "cards/brine-solution-by-percent.card.json",
    "card_sha256": "30474c9e378ca35ad61e406e1e1753521182ae8b96adcaa38335fe600ca0838f",
    "method_sha256": "93d28145e55877539a997eccb59aac834135c73ae606689b12f3c3273253c937",
    "address": "b3bfe00bfd66d08ec9308ceb9b25c640"
  },
  {
    "slug": "cooking-time-scaling-by-weight",
    "title": "Cooking time scaling by weight",
    "deck_category": "cooking",
    "file": "cards/cooking-time-scaling-by-weight.card.json",
    "card_sha256": "05e1a8f65524b580bcb229abb6eb8eb0faa256079a153c145d6f835681121b12",
    "method_sha256": "860d5c9bcb8c6ed0f8038f7ccc4ce3b7e47ce51d8673aa3ab01e933bcd88d874",
    "address": "45e0938e321913ee7adada294f0cf5ff"
  },
  {
    "slug": "cups-to-grams-common-ingredients",
    "title": "Cups to grams for common ingredients",
    "deck_category": "cooking",
    "file": "cards/cups-to-grams-common-ingredients.card.json",
    "card_sha256": "4289f875a91d86bf9255fde3f15f29d93f7933ad88916565013b2bafbedfd946",
    "method_sha256": "fb125ef277436ddba0480d19ff3a3b90ebbaebef8eb785bcdf97d51b77f03cc6",
    "address": "8dcf2e2cf99f0e3ab9a95ddb8928e9b1"
  },
  {
    "slug": "oven-temperature-conversion",
    "title": "Oven temperature conversion",
    "deck_category": "cooking",
    "file": "cards/oven-temperature-conversion.card.json",
    "card_sha256": "5d1aab9b04254b152a7e0f4dc05386aafb77711d65ec9bc04783817eb8fb426f",
    "method_sha256": "f6ce8786a4614551928198541070349c4e1bef5b5c93ab35141df0b9cc578f58",
    "address": "ffe9140e8c3a625f95607195683838d2"
  },
  {
    "slug": "recipe-scaling",
    "title": "Recipe scaling",
    "deck_category": "cooking",
    "file": "cards/recipe-scaling.card.json",
    "card_sha256": "ae75507812346ee81dbfb72e9a46a98d0236da604c42b85da074bd39175fe106",
    "method_sha256": "2da2b22b66d471382c776fdd18187e692cf541929631c0967a314d3c82e72d18",
    "address": "e398b192aae298b288e1a80341479b1e"
  },
  {
    "slug": "currency-conversion-ecb",
    "title": "Currency conversion at a stated reference rate.",
    "deck_category": "currency",
    "file": "cards/currency-conversion-ecb.card.json",
    "card_sha256": "cb2b6e05a6e8ef7f07c85fb8c71850d8cda1114f6fb997490bd669284531fb2e",
    "method_sha256": "376d66ce5c648ca2558f4422d8cf2f70b8a97bdf38979e475a9ef63f12ca7a50",
    "address": "c3d87e3271662ba4fc9066ddff764443"
  },
  {
    "slug": "currency-cross-rate",
    "title": "Currency cross rate",
    "deck_category": "currency",
    "file": "cards/currency-cross-rate.card.json",
    "card_sha256": "8accf688ed3428ca9537c1d7a0d54777bfa7845899d307539e71cc1fec22cbc6",
    "method_sha256": "b53c11ca67bc425d64cf1bf46e9efd80fe19aca01dc83f82091c5055ed18ae2a",
    "address": "570d44f9c1574ecd2104fbdcdc9fce0f"
  },
  {
    "slug": "price-with-vat-or-sales-tax",
    "title": "Price with VAT or sales tax",
    "deck_category": "currency",
    "file": "cards/price-with-vat-or-sales-tax.card.json",
    "card_sha256": "c9903a7930616f9945bef993af31e59e9933e750aac8a43860ba45a0b567030b",
    "method_sha256": "79d252e2608234d3a588bf5997ec535794db216ed11e8a0fce048b96d79478ab",
    "address": "35c944c9dac676c8ecbc5ac8ed89f096"
  },
  {
    "slug": "unit-price-comparison",
    "title": "Unit price comparison",
    "deck_category": "currency",
    "file": "cards/unit-price-comparison.card.json",
    "card_sha256": "65311d98903f923981047e814c845b42af6a4b12c90ff6b8d9e0b9258b1d7ecb",
    "method_sha256": "9277983fded630dc6731b8624bb10e5fe9d6cc6d8e215163b678c710ce1a2fab",
    "address": "635d6a00d75d2ab303e734b8f00bca4e"
  },
  {
    "slug": "add-business-days",
    "title": "Add business days to a date",
    "deck_category": "dates",
    "file": "cards/add-business-days.card.json",
    "card_sha256": "0de0161608ccfe62c1638b20ff0f596cb03877c4bc6f3acd2162a4ea6e39f925",
    "method_sha256": "2ba82ac0af5ccf9ddc4e47e225343afc2108bfbf020a024a3612ad746dfaa924",
    "address": "05822e3e7b8de24750965dae6f94d144"
  },
  {
    "slug": "add-days-to-date",
    "title": "Add days to a date",
    "deck_category": "dates",
    "file": "cards/add-days-to-date.card.json",
    "card_sha256": "efd4eab779fedc18904c3b531b23517756a9c7b789d82329799caf905361a875",
    "method_sha256": "d770809d18f84cb8bec3f5875d2f1134d12d3a187b21a282c73b7bdf26fa1718",
    "address": "64d7245fc1c632513712b6898bbf4665"
  },
  {
    "slug": "age-in-years-months-days",
    "title": "Age in years, months, and days",
    "deck_category": "dates",
    "file": "cards/age-in-years-months-days.card.json",
    "card_sha256": "6a9dd587dd2ada1395e5a1000a945d64afc4ad3ac5a4a04a4fdbcdbac53a8685",
    "method_sha256": "0faf80f4f9e159fdfdcfd6d78e0b8aee977ffc4f5eabe7c086af63d2368a7398",
    "address": "3415f8d8474882a814ad65b0a0e13216"
  },
  {
    "slug": "countdown-to-date",
    "title": "Countdown to a date",
    "deck_category": "dates",
    "file": "cards/countdown-to-date.card.json",
    "card_sha256": "59891cc85ab6f02dbd6474e71205d02e1e267cc6494d024427e5fe81511bcc96",
    "method_sha256": "70b844d4d8e297ba24837b668de24117a7344b9600ac253c415f4be7579b641d",
    "address": "cb67164bfec903b72a540c00e1bca6f7"
  },
  {
    "slug": "day-of-year-and-days-remaining",
    "title": "Day of year and days remaining",
    "deck_category": "dates",
    "file": "cards/day-of-year-and-days-remaining.card.json",
    "card_sha256": "1108a6b72fe7f5a933b517caf5de74d7dfa471ced21988a0cc743760f9b09109",
    "method_sha256": "09ba5314b5d4ca8115a7edcc1f2b4a0e3b330d8f55cc6c234964bb1150260ddb",
    "address": "4a7ea29599fbd053377815d25a262e5b"
  },
  {
    "slug": "days-between-dates",
    "title": "Days between two dates",
    "deck_category": "dates",
    "file": "cards/days-between-dates.card.json",
    "card_sha256": "fdd96445f041f579d9200201a6306cdc88f82c814f3698d306bb57114c20c792",
    "method_sha256": "f413db031783d3260f0209a36522852b6256538df83124578c6cd4d910fcc633",
    "address": "3d77e7f4e0dfc44e663cbae03f9e76d8"
  },
  {
    "slug": "easter-date-gregorian",
    "title": "Date of Easter (Western, Gregorian)",
    "deck_category": "dates",
    "file": "cards/easter-date-gregorian.card.json",
    "card_sha256": "dc12e329e3f1be33591fbd7891af18b91e3ecaa217417265326305d2e81ead98",
    "method_sha256": "bb4a920adc1880362b16a422f751f329d8be4e6683a6419cf76273c5b6afd308",
    "address": "ed607d4e8ca53acb85a864d298371345"
  },
  {
    "slug": "is-leap-year",
    "title": "Is it a leap year?",
    "deck_category": "dates",
    "file": "cards/is-leap-year.card.json",
    "card_sha256": "7c5165a83292b54313be215e09b99bc118fe6166e59ffa79d5e451fdf1264aa8",
    "method_sha256": "bedbb6cd17134c76341c4dcbb83a8baaafbb9f2060109d14317f3fbfa8c471cb",
    "address": "e40c085c184861f24f9c6e0ad8a79172"
  },
  {
    "slug": "iso-week-number",
    "title": "ISO week number",
    "deck_category": "dates",
    "file": "cards/iso-week-number.card.json",
    "card_sha256": "6c106ccfa5436ddc5b80d831da657b3fc0bafccf0bbfb7cdec0d3c3f99323bd9",
    "method_sha256": "9ce6bb2d01774de5e101abdc48014d2a5a7629ed433f89c8db84b2c91bf95f72",
    "address": "ba61dd5e94e9a11e09edcd2c2a586080"
  },
  {
    "slug": "julian-day-number",
    "title": "Julian Day Number of a civil date",
    "deck_category": "dates",
    "file": "cards/julian-day-number.card.json",
    "card_sha256": "2e94941ac57e2c35303f3013f15108cdcb122ce85dcb81cf9d9fd2e034bc509a",
    "method_sha256": "c300e9aaa1ec27c3b141cb0cf719516b287f32e985d8eba4d33c059f67934b83",
    "address": "c7f1588e7d1e5143d8f697fdcbfcc10e"
  },
  {
    "slug": "quarter-and-fiscal-year",
    "title": "Calendar quarter and fiscal year",
    "deck_category": "dates",
    "file": "cards/quarter-and-fiscal-year.card.json",
    "card_sha256": "7673672010658c976dcb9cf1a36f1a92b0a608423bd202c6959daa870835c301",
    "method_sha256": "aaf8bea3fcdeb55ce7c9678e4d684fef5c5036f065fb7a19d758078625658b00",
    "address": "89b6f28af27216d07087f365646e5252"
  },
  {
    "slug": "weekday-of-date",
    "title": "Weekday of a date",
    "deck_category": "dates",
    "file": "cards/weekday-of-date.card.json",
    "card_sha256": "a8c3d7cabf706a7667d2a4ddd893ea48c91933d27fd5e6d052dc27d46f28a760",
    "method_sha256": "d2245aad8a43e5a1d0059ae77babc58f5d457d3b37ff4c5187d66c203eee6679",
    "address": "b05a15968f2f5d61c84c549313ab0900"
  },
  {
    "slug": "amortization-schedule-row",
    "title": "Amortization schedule row",
    "deck_category": "finance",
    "file": "cards/amortization-schedule-row.card.json",
    "card_sha256": "687d3a0692e9d2a58e8bdd749dc7a9ced4f2f92cb73f563ef534db6a89ba2c56",
    "method_sha256": "d7611c37d0df74df61327a266c3593af0c1c17811b0bc4366e3731d3b6394b38",
    "address": "8a524043e544c574b2a72e729fe3d80d"
  },
  {
    "slug": "apr-to-apy",
    "title": "APR to APY (effective annual rate)",
    "deck_category": "finance",
    "file": "cards/apr-to-apy.card.json",
    "card_sha256": "ba3a0e014f816918ec2b39e2415c111540861ff38765e14cbfb7cc37383647ad",
    "method_sha256": "f3b0995a9d6d3d74550a8a7f13f03b4cbbef7ba31a2b6b9111a9aec73f94bee6",
    "address": "035b0d84792e2c80de55d6a3f7c5cbee"
  },
  {
    "slug": "break-even-units",
    "title": "Break-even units",
    "deck_category": "finance",
    "file": "cards/break-even-units.card.json",
    "card_sha256": "7e43eef24d53af6fe7ba2bc0926011366e08b384cec8a310c433dac5e17cfb46",
    "method_sha256": "203a0c6fc7c57ed6724edd9ed9b6eb672b3387e9890af7b4088ea5d87e466ecc",
    "address": "60f82735ae8e6a8a44e4b6befb863123"
  },
  {
    "slug": "compound-interest",
    "title": "Compound interest",
    "deck_category": "finance",
    "file": "cards/compound-interest.card.json",
    "card_sha256": "f3459860463b72de03cfab44e21158a8fdb48c0d50c5b0bbc6a75eb00ad2b408",
    "method_sha256": "b3e7f67052e07cf4aec7d6dc868531799f6dad8640cfbd5480c9b18d5b181d16",
    "address": "3e62459b4c99fb861413e2e0f5de0915"
  },
  {
    "slug": "discount-and-markup",
    "title": "Discount and markup",
    "deck_category": "finance",
    "file": "cards/discount-and-markup.card.json",
    "card_sha256": "69c7036d7bf830e80ff8cb58605763cf4f7e278e0bff1a6f6c2fce862e874e1d",
    "method_sha256": "930d26f3c36600e17119d6076c26cf84f7593f695cca543c1ebea9ff1fdeb185",
    "address": "251a9263a9fb97bca6572c2fedb04f20"
  },
  {
    "slug": "future-value-of-annuity",
    "title": "Future value of an annuity",
    "deck_category": "finance",
    "file": "cards/future-value-of-annuity.card.json",
    "card_sha256": "dd53a8b30e043787068f3643398c253a494c770631209b0f1b0345f1698d985e",
    "method_sha256": "95e8308bf9a2cd1bc0b3eb0e711570a405e97ee4414b519dd99513dc5f3190d3",
    "address": "926c6ab87d040d83a7d12c1188184800"
  },
  {
    "slug": "inflation-adjusted-value",
    "title": "Inflation-adjusted value (CPI method)",
    "deck_category": "finance",
    "file": "cards/inflation-adjusted-value.card.json",
    "card_sha256": "a2a07d68737ae9d62017040fb43136e14e038a0266c0179f9c37580d59f3f204",
    "method_sha256": "00d8b6cf5367cf1564faa782e52029fe9d09bae2b0abad6140556eb23fb3ea3b",
    "address": "cce876f268ffb90dbb9c4d5faec4503b"
  },
  {
    "slug": "loan-payment-amortized",
    "title": "Amortized loan payment",
    "deck_category": "finance",
    "file": "cards/loan-payment-amortized.card.json",
    "card_sha256": "72c6949071989d28be03cf0e2841363f9c65d66ed0f6750624baed44163ca4f2",
    "method_sha256": "28032747da12557a7998f049ff904087501f4a0c6c544f5aeedcceca02f52b7b",
    "address": "91bcf29a82898933ec2fdb47abaa0fa2"
  },
  {
    "slug": "percent-change-and-cagr",
    "title": "Percent change and CAGR",
    "deck_category": "finance",
    "file": "cards/percent-change-and-cagr.card.json",
    "card_sha256": "735496ac67372c6b53415326ffc00abea55f8431496d1e4949704a3f7b5f6fee",
    "method_sha256": "efcd66fd1548d9423134c81c10bdeb7eea0fceda4f615970d87160c07fa65978",
    "address": "6f582ae0ba622f025e68008849246b2f"
  },
  {
    "slug": "present-value-of-lump-sum",
    "title": "Present value of a lump sum",
    "deck_category": "finance",
    "file": "cards/present-value-of-lump-sum.card.json",
    "card_sha256": "5f34155d94f93ef5cfad3dc189f0f0fff88b902bf1a051b15f0dadef6a7422e1",
    "method_sha256": "adf9339a91636ce36baa08d3eb2fa04d720166314898660bfb10e4febe33f555",
    "address": "3328c20034229a4594ee07438eb2b123"
  },
  {
    "slug": "rule-of-72-and-exact-doubling-time",
    "title": "Rule of 72 and exact doubling time",
    "deck_category": "finance",
    "file": "cards/rule-of-72-and-exact-doubling-time.card.json",
    "card_sha256": "3b30e26c942a7454574557c957a778a21382338fab6ee6758996a0d522bf00c5",
    "method_sha256": "fa1e6742ec6dc7659251d22c510305ba110c9258a403dae71eb6aa3c4f220acf",
    "address": "604e3fffadfa40c7bc7aadacb51d6677"
  },
  {
    "slug": "simple-interest",
    "title": "Simple interest",
    "deck_category": "finance",
    "file": "cards/simple-interest.card.json",
    "card_sha256": "1aec1783dd97e0d482645ac594a0c830cc4be0ab490f7bf80b8e3642b645be41",
    "method_sha256": "30df7eda3f957ac2199ab95fe37633e5b8cfe266b53044939d7e918bcfe7e7c9",
    "address": "76dfe2ce8f7f7f40fbdeb8f58b950adb"
  },
  {
    "slug": "tip-and-split-bill",
    "title": "Tip and split a bill",
    "deck_category": "finance",
    "file": "cards/tip-and-split-bill.card.json",
    "card_sha256": "a6d93c12b3c0dbfaf8b927c7e83fe557a33285ab5757a975e01510570090a796",
    "method_sha256": "99269013230ed5b5e5e7ee55c64e529cc29b04fccbb4bd1d6e43135544811a1e",
    "address": "86950c0de7f0e2d7475eaad57723775a"
  },
  {
    "slug": "total-interest-over-loan",
    "title": "Total interest over a loan",
    "deck_category": "finance",
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  {
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    "slug": "ideal-body-weight-devine",
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    "slug": "target-heart-rate-zones",
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    "slug": "luhn-check-digit",
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    "slug": "pressure-altitude-standard-atmosphere",
    "title": "Pressure altitude from station pressure (ISA)",
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    "slug": "ratio-and-proportion-solve",
    "title": "Solve a proportion a:b = c:x",
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    "slug": "reading-time-estimate",
    "title": "Reading time estimate",
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    "file": "cards/reading-time-estimate.card.json",
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    "slug": "roman-numerals-convert",
    "title": "Roman numeral conversion",
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    "file": "cards/roman-numerals-convert.card.json",
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    "slug": "wind-chill-us-nws",
    "title": "Wind chill (US NWS 2001 formula)",
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    "file": "cards/wind-chill-us-nws.card.json",
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    "slug": "fica-payroll-tax",
    "title": "FICA payroll tax, by stated table",
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    "file": "cards/fica-payroll-tax.card.json",
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    "slug": "marginal-vs-effective-tax-rate",
    "title": "Marginal vs. effective tax rate, by tax year",
    "deck_category": "tax",
    "file": "cards/marginal-vs-effective-tax-rate.card.json",
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    "slug": "standard-deduction-vs-itemized",
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    "title": "US federal income tax, by tax year",
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    "title": "Flight duration across time zones",
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    "slug": "us-dst-in-effect",
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    "slug": "angle-conversion",
    "title": "Angle conversion",
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    "slug": "area-conversion",
    "title": "Area conversion",
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    "title": "Data size conversion",
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  {
    "slug": "energy-conversion",
    "title": "Energy conversion",
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    "file": "cards/energy-conversion.card.json",
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  {
    "slug": "fuel-economy-conversion",
    "title": "Fuel economy conversion",
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