Multiple choice general knowledge

How many three digit octal numbers end with 3?

  1. 3

  2. 8

  3. 49

  4. 56

  5. 64
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Three-digit octal numbers range from 100₈ to 777₈. Numbers ending with digit 3 in octal have the form XY3₈ where the hundreds digit X can be 1-7 (7 choices, cannot be 0 for a three-digit number) and the middle digit Y can be 0-7 (8 choices). Total = 7 × 8 = 56 such numbers.

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