🎯 RankerClub is 100% Free — 97 full-length mock tests with an instant all-India rank. Register Free →
RankerClub
Log in Get Started Free
Log in Register Free

SSC GD Constable Number System Questions with Answers & Explanations

20 Number System questions from the Elementary Mathematics section of SSC GD Constable, each with the correct answer and a worked explanation. Try each question first, then tap Show answer to check. When you're ready, take the timed chapter-wise test to see your all-India rank.

Take the Elementary Mathematics test → SSC GD Constable full mocks
Question 1

What is the HCF of 40 and 56?

  1. A40
  2. B8
  3. C16
  4. D35
Show answer
Answer: (B) 8 40 = 8 × 5 and 56 = 8 × 7, so HCF = 8.
Question 2

What is the remainder when 22325 is divided by 13?

  1. A5
  2. B4
  3. C2
  4. D1
Show answer
Answer: (B) 4 22325 = 13 × 1717 + 4.
Question 3

What is the square root of 1936?

  1. A44
  2. B45
  3. C46
  4. D43
Show answer
Answer: (A) 44 44 × 44 = 1936.
Question 4

What is the unit digit of 13^26?

  1. A5
  2. B3
  3. C2
  4. D9
Show answer
Answer: (D) 9 Unit digits of powers of 3 repeat in a cycle of 4; 26 mod 4 = 2, so the unit digit is 9.
Question 5

What is the sum of the first 95 natural numbers?

  1. A4655
  2. B9025
  3. C4465
  4. D4560
Show answer
Answer: (D) 4560 Sum = n(n + 1)/2 = 95 × 96/2 = 4560.
Question 6

What is the sum of the first 78 natural numbers?

  1. A3003
  2. B6084
  3. C3081
  4. D3159
Show answer
Answer: (C) 3081 Sum = n(n + 1)/2 = 78 × 79/2 = 3081.
Question 7

What is the HCF of 54 and 126?

  1. A18
  2. B9
  3. C36
  4. D54
Show answer
Answer: (A) 18 54 = 18 × 3 and 126 = 18 × 7, so HCF = 18.
Question 8

What is the remainder when 67727 is divided by 17?

  1. A10
  2. B0
  3. C16
  4. D2
Show answer
Answer: (C) 16 67727 = 17 × 3983 + 16.
Question 9

What is the unit digit of 27^29?

  1. A7
  2. B5
  3. C1
  4. D8
Show answer
Answer: (A) 7 Unit digits of powers of 7 repeat in a cycle of 4; 29 mod 4 = 1, so the unit digit is 7.
Question 10

What is the value of 68² − 23²?

  1. A4140
  2. B4195
  3. C2025
  4. D4095
Show answer
Answer: (D) 4095 a² − b² = (a + b)(a − b) = 91 × 45 = 4095.

Ready for the real thing?
Timed Elementary Mathematics test · 20 questions · instant rank

Start free test
Question 11

What is the square root of 1444?

  1. A35
  2. B37
  3. C40
  4. D38
Show answer
Answer: (D) 38 38 × 38 = 1444.
Question 12

What is the sum of the first 25 natural numbers?

  1. A350
  2. B325
  3. C300
  4. D625
Show answer
Answer: (B) 325 Sum = n(n + 1)/2 = 25 × 26/2 = 325.
Question 13

What is the LCM of 54 and 72?

  1. A216
  2. B3888
  3. C234
  4. D432
Show answer
Answer: (A) 216 LCM = HCF × 3 × 4 = 216.
Question 14

What is the remainder when 63583 is divided by 9?

  1. A2
  2. B6
  3. C7
  4. D0
Show answer
Answer: (C) 7 63583 = 9 × 7064 + 7.
Question 15

What is the unit digit of 9^85?

  1. A9
  2. B1
  3. C7
  4. D2
Show answer
Answer: (A) 9 Unit digits of powers of 9 repeat in a cycle of 4; 85 mod 4 = 1, so the unit digit is 9.
Question 16

What is the value of 77² − 25²?

  1. A5404
  2. B5204
  3. C2704
  4. D5304
Show answer
Answer: (D) 5304 a² − b² = (a + b)(a − b) = 102 × 52 = 5304.
Question 17

What is the square root of 2809?

  1. A55
  2. B54
  3. C53
  4. D52
Show answer
Answer: (C) 53 53 × 53 = 2809.
Question 18

What is the sum of the first 92 natural numbers?

  1. A4186
  2. B4370
  3. C8464
  4. D4278
Show answer
Answer: (D) 4278 Sum = n(n + 1)/2 = 92 × 93/2 = 4278.
Question 19

What is the HCF of 42 and 98?

  1. A21
  2. B14
  3. C42
  4. D7
Show answer
Answer: (B) 14 42 = 14 × 3 and 98 = 14 × 7, so HCF = 14.
Question 20

What is the remainder when 54523 is divided by 7?

  1. A0
  2. B6
  3. C2
  4. D5
Show answer
Answer: (A) 0 54523 = 7 × 7789 + 0.

These are RankerClub practice questions written in the SSC GD Constable pattern. They are not official SSC/IBPS/RRB papers.

More Elementary Mathematics topics

Speed, Time & Distance 23 Qs Profit, Loss & Discount 21 Qs Mensuration 20 Qs Simple & Compound Interest 19 Qs Simplification & Approximation 18 Qs Mixture & Alligation 18 Qs Average 18 Qs Time & Work 17 Qs

All SSC GD Constable topics →