Problems on H.C.F and L.C.M
The product of two numbers is 2028 and their H.C.F. is 13. The number of such pairs is:

1
2
4
3

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Problems on H.C.F and L.C.M
Find the greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively.

127
221
445
379

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