Number System MCQs with Answers Exercise III

Ques 1 Number System

Find the number of trailing zero in 149!.?

A 20

B 24

C 35

D 41

By using the above formula..

no of trailing zero=(ⁿ⁄₅)+(ⁿ⁄₂₅)+(ⁿ⁄₁₂₅)+(ⁿ⁄₆₂₅)+.......................

no of trailing zero in 149!=(¹⁴⁹⁄₅)+(¹⁴⁹⁄₂₅)+(¹⁴⁹⁄₁₂₅)+(¹⁴⁹⁄₆₂₅)

no of trailing zero in 149!=29+5+1+0
no of trailing zero in 149!=35

Ques 2 Number System

Two numbers differ by 5. If their product is 336, the sum of the two numbers is.

A 25

B 28

C 30

D 37

Ques 3 Number System

The unit digit in the product (124)372 + (124373 is.

A 0

B 4

C 9

D 2

Ques 4 Number System

The unit digit in the product (124)³⁷² + (124³⁷³ is.

A 0

B 4

C 9

D 2

Ques 5 Number System

What is the unit digit of 1! + 2! + 3! + ……+99!.?

A 2

B 3

C 6

D 8