Question
The product of two numbers is 504 and their HCF is 6.
Total number of such pairs of numbers is?  ÂSolution
As HCF is 6 so let numbers be 6x & 6y. It means x & y must be co-prime. Now 6x × 6y = 504, So xy = 14. Now pairs of (x, y) can be (1,14) & (2, 7). Here (1,14) & (2, 7) are co-prime so number of pairs are 2.Â
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36, 48, 24, 60, ?, 72
60, 120, ?, 160, 32, 192
5, 12, 24, 36, 52, ?
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1, 2, 6, 21, 88, ? 10, 10, 15, 30, 75, ?
Find the missing number in the given number series.
8, 9, 16, 11, 32, 13, ?What will come in place of the question mark (?) in the following series?
146, 122, ? , 74, 50, 26
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