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Brainteasers and Pure Mathematics› Number Theory and Digits› 31.2 Modular Arithmetic
Problem 31.22 ★★★Medium Coming soon

Missing Digit by Casting Out Nines

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Try 31.17 Units Digit of a Power
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Section 31.2

Modular Arithmetic Toolkit
  1. 31.17Units Digit of a Power
  2. 31.18Large Powers Modulo n
  3. 31.19Remainder One Less Than Divisor
  4. 31.20Frobenius Coin Problem
  5. 31.21Linear Diophantine Parametrisation
  6. 31.22Missing Digit by Casting Out Nines
  7. 31.23Cubes Ending in 11
  8. 31.24Cyclic Shifts Divisible by 37
  9. 31.25Period of a Perfect Riffle Shuffle
  10. 31.26Period of the Over-Under Shuffle
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