Question

2ab5 is a four digit number divisible by 25. if a number formed from the two digits ab is a multiple of 13 then ab is

Answer 1

For a number to be divisible by 25 it's last digit must be 00, 25 , 50 , 75

we are given that "ab" is multiple of 13
here in "ab" , (b) must be 2 or 7

The only 2digit multiple of 13 satisfying this condition is 13×4 = 52
b = 2

therefore ab = 52


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