Question

A number 254786ab is completely divisible by 40, What is maximum value of a and b?

A (8, 0) Correct Answer Incorrect Answer
B (5, 0) Correct Answer Incorrect Answer
C (1, 2) Correct Answer Incorrect Answer
D (0, 8) Correct Answer Incorrect Answer

Solution

40= 10 × 4 For 10 last digits should be 0. Max value 0 possible b=0, for 4 last two digit should be divisible by 4. B is zero so a will be maximum 8. (8, 0) is a, b.

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