Multiple choice general knowledge math & puzzles

If a positive two digit number is given as AB where A and B are digits of the number. It is alo given that AB is divisible by 9 then A+B is :

  1. less than or equal to 9

  2. greater than or equal to 9

  3. always equal to 9

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

For a number AB to be divisible by 9, the sum A+B must be a multiple of 9. For two-digit numbers, A+B can be 9 or 18. Since A+B=9 for most cases (18, 27, 36...81) and equals 18 for 99, the sum is always >= 9 but not always equal to 9. Option B correctly states A+B >= 9.

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