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Aptitude - Problems on H.C.F and L.C.M

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  • General Questions
"Everything you can imagine is real."
- Pablo Picasso
16. 

The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one of the numbers is 275, then the other is:

A. 279B. 283
C. 308D. 318

17. 

What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?

A. 196B. 630
C. 1260D. 2520

18. 

The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is:

A. 12B. 16
C. 24D. 48

19. 

The smallest number which when diminished by 7, is divisible 12, 16, 18, 21 and 28 is:

A. 1008B. 1015
C. 1022D. 1032

20. 

252 can be expressed as a product of primes as:

A. 2 x 2 x 3 x 3 x 7B. 2 x 2 x 2 x 3 x 7
C. 3 x 3 x 3 x 3 x 7D. 2 x 3 x 3 x 3 x 7




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