Book Maths Puzzle

The least number which should be added to 28523 so that the sum is exactly divisible by 3, 5, 7 and 8 is

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Book Other Question

What is the least number which when doubled will be exactly divisible by 12, 14, 18 and 22 ? The H.C.F. of two numbers is 5 and their L.C.M. is 150. If one of the numbers is 25, then the other is: