**Number System Quantitative Aptitude MCQ Questions Answer**

The number system is the foundation of mathematics, serving as a fundamental concept across various mathematical disciplines. Its importance extends beyond mathematics, influencing fields like science, engineering, and technology. Mastering the number system is crucial for a strong mathematical foundation. In this article, we present a collection of multiple-choice questions (MCQs) designed to test and enhance your understanding of the number system.

**1)The unit digit in the product of (2157) ^{173} is **

a) 3

b) 7

c) 9

d) 1

**2) The unit digit in the expression **

(11^{1}+12^{2}+13^{3}+14^{4}+15^{5}+16^{6}) is

a)1

b) 9

c) 7

d) 0

**3) which of the following numbers should be added to 11158 to make it exactly divisible by 77 ?**

a) 9

b) 8

c) 7

d) 5

**4) How many numbers between 200 and 600 are divisible by 4,5 and 6 ?**

a) 5

b) 6

c) 7

d) 8

**5)When n is divided by 4, the remainder is 3. What is the remainder when 2n is divided by 4 ?**

a) 1

b) 2

c) 3

d) 6

**6)If the sum of a number and its square is 240. What is the number ?**

a) 15

b) 18

c) 25

d) 22

**7) The digit in the unit place of the number represented by (7 ^{95} – 3^{58}) is**

a) 0

b) 7

c) 6

d) 4

**8) The number nearest to 99547 which is exactly divisible by 687 is**

a) 100166

b) 98928

c) 99479

d) 99615

**9) The number of zero in 18! Is**

a) 4

b) 6

c) 3

d) 8

**10) If a ^{3}b =abc=180 and a,b,c are positive integers. Then, value of c is**

a) 110

b) 15

c) 25

d) 1

**11) The sum of first 45 natural number is **

a) 2070

b) 1035

c) 1280

d) 2140

**12) The sum of three numbers is 68. If the ratio between first and second be 2 : 3 and that between second and third be 5 : 3, then the 2 ^{nd} number is**

a) 30

b) 20

c) 58

d) 48

**13) Two fifth of thirty percentage of one fourth of a number is 15. What is 20% of that number ?**

a) 90

b) 150

c) 100

d) 120

**14) What least value should be assigned to, so that the number 451*603 is exactly divisible by 9?**

a) 2

b) 5

c) 8

d) 7

**15) What will be the remainder when (9 ^{6} +1) is divided by 8 ?**

a) 0

b) 3

c) 7

d) 2

**16) The sum of the digits of a two digit number is 12. If the digit are reversed, the number is decreased by 18. The number is**