Question

replace _ in 625_ with the least no. so that no. is divisible by 11

Answer 1

the least number is 616 So that it is divisible by 11.

Answer 2

Divisibility rule of 11:

The divisibility rule of 11 says that the difference of sum of digits at odd position and sum of digits at even position should be either 0 or should be a multiple of 11.

In other words, start from last digit and keep on adding every alternate digit up-till extreme right , and let’s call this value sum1. Now, start from last second digit and keep on adding every alternate digit up-till extreme right , and let’s call this value sum2.

For divisibility of 11: sum1 - sum2 = 0 or multiple of 11
now assume that number is 3

6+2-5+3=0

it satisfied divisibility rule of 11

answer is 3

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