Here are some important and previous year question of SSC CHSL of Number System along with Solution.

1) A number x when divided by 289 leaves 18 as the remainder. The same number when divided by 17 leaves y as a remainder. The then the value of y is

A 2

B 3

C 1

D 5

**Answer C**

2) In the following number series a wrong number is given. Find out that number.

8, 18, 40, 86, 178, 370, 752

A 178

B 180

C 128

D 156

**Answer: A**

3) Find the unit digit in the product .

4387²⁴⁵ × 621⁷²

A 1

B 2

C 5

D 7

**Answer D**

4) When a number is increased by 24, it becomes 110% of itself. What is the number?

A 288

B 360

C 216

D 240

**Answer: D**

5) Three consecutive natural numbers are such that the square of the greatest is greater than the product of the other two by 16. The smallest of these numbers is

A 5

B 6

C 7

D 4

**Answer: D**

6) How many numbers are there from 300 to 650 which are completely divisible by both 5 and 7?

A 8

B 9

C 10

D 12

**Answer: C**

7) The sum of a non-zero number and twenty times its reciprocal is 9. What is the number?

A -5

B 3

C -3

D 5

**Answer: D**

8) If 49 is subtracted from the square of a number, then the result obtained is 576. What is the number?

A 24

B 25

C 23

D 27

**Answer B**

9) 3¹¹ +3¹² +3¹³ +3¹⁴ is divisible by

A 7

B 8

C 11

D 14

**Answer: B**

10) If upto 60 terms, then what is the value of ?

A -360

B -310

C -240

D -270

**Answer: D**

11) The sum of series 1+2+3+4+……..998+999+1000

A) 5050

B) 500500

C)5500000

D)55000

**Answer B**

12) The sum of all the numbers between 100 and 200 which are multiples of 3 is

A) 5000

B) 4950

C)4980

D)4900

**Answer B**

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