21)

Five bells ring together at the intervals of 3, 5, 8, 9 and 10 seconds. All the bells ring simultaneously at the same time. They will again ring simultaneously after:

SSC CPO 2020

A)

6 minutes

B)

4 minutes

C)

9 minutes

D)

8 minutes

22)

When a number is successively divided by 3, 4 and 7, the remainder obtained is 2, 3 and 5, respectively. What will be the remainder when 42 divides the same number?

SSC CPO 2020

A)

41

B)

29

C)

31

D)

30

23)

The HCF of two numbers is 29, and the other two factors of their LCM are 15 and 13. The smaller of the two numbers is:

SSC CPO 2020

A)

435

B)

406

C)

377

D)

464