Question

in 27 M 53, replace M by the smallest number to make resulting number divisible 3

Answer 1

we know that for a no. to be divisible by 3, the sum of digits of that no. must be an integral multiple of 3. M cannot be negative. Now, the sum of the digits is 17. so M must be 1 for it to be 18, and hence being divisible by 3.

Answer 2

if we place 1 in place of M then the resulting number will be 27153.
then this will be divisible by 3........so the correct answer to replace M is 1