replace the _ in 625 _ with the least number so that the number is divisible by 11....
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Replace the _ with 9.
The divisibility test of 11 says that the difference between the sum of odd and even places of the number should be zero or a multiple of 11.
In this case, the sum of numbers in odd places is 11. The 1st even positioned no. is 2 and hence the second even positioned no. should be 9 to make the sum 11 and the difference 0.
The divisibility test of 11 says that the difference between the sum of odd and even places of the number should be zero or a multiple of 11.
In this case, the sum of numbers in odd places is 11. The 1st even positioned no. is 2 and hence the second even positioned no. should be 9 to make the sum 11 and the difference 0.
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