# LCM-HCF TNPSC Group 1 Questions

## LCM-HCF MCQ Questions

13.

LCM of two numbers is 14 times their HCF. The sum of LCM and HCF is 600. If one number is 280 then the other number is

Group 1 - 2014

A.

40

B.

60

C.

80

D.

100

C. 80

14.

Find the L.C.M of 45,4-81,412 and 47

Group 2 - 2015

A.

412

B.

4

C.

42

D.

4-2

A. 412

15.

Which one of the following statements is false?

Group 4 - 2018

A.

Among the common divisors of given numbers,the greatest divisor is the G.C.D.

B.

If the G.C.D. of any two numbers is 1 they are said to be prime numbers

C.

Among the commom multiples of given numbers,the least is the L.C.M

D.

The product of any two numbers is equal to the product of their G.C.D. and L.C.M.

B. If the G.C.D. of any two numbers is 1 they are said to be prime numbers

16.

Find the H.C.F of 4/9,2/5,6/8,2/5

Group 2 - 2015

A.

1/180

B.

2/481

C.

2/350

D.

1/142

A. 1/180

17.

The number of numbers-pairs lying between 40 and 100 with their H.C.F. as 15 is

Group 4 - 2013

A.

3

B.

4

C.

5

D.

2

B. 4

18.

The sum of two numbers is 20. Their product is 96. then their H.C.F. is

Group 1 - 2013

A.

2

B.

4

C.

8

D.

10  