1.

The L.C.M. of two different numbers are 30. Which of the following cannot be their H.C.F.?1. 122. 153. 64. 10

Answer» Correct Answer - Option 1 : 12

Given:

The L.C.M. of two different numbers are 30.

Concept used:

L.C.M. of two different numbers = H.C.F. × Prime factor of first number × Prime factor of second number

Calculation:

H.C.F. is the factor of L.C.M.

∴ H.C.F. divides L.C.M. completely.

Here option 2, option 3 and option 4 are dividing L.C.M. completely and option 1 is not dividing L.C.M. completely. 

∴ option 1 cannot be H.C.F.

 

 



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