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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