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

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  • General Questions
"Life is like riding a bicycle. To keep your balance you must keep moving."
- Albert Einstein
1. 

Find the greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case.

A. 4B. 7
C. 9D. 13

2. 

The H.C.F. of two numbers is 23 and the other two factors of their L.C.M. are 13 and 14. The larger of the two numbers is:

A. 276B. 299
C. 322D. 345

3. 

Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?

A. 4B. 10
C. 15D. 16

4. 

Let N be the greatest number that will divide 1305, 4665 and 6905, leaving the same remainder in each case. Then sum of the digits in N is:

A. 4B. 5
C. 6D. 8

5. 

The greatest number of four digits which is divisible by 15, 25, 40 and 75 is:

A. 9000B. 9400
C. 9600D. 9800




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