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SSC Quantitative Aptitude Challenge — 100 MCQs

A comprehensive SSC Quantitative Aptitude practice quiz covering important mathematical concepts and exam-oriented questions for SSC aspirants.

25 Questions

30 min Duration

75% To pass

1.00 Marks / correct

Instructions

This quiz has 25 questions.
Questions are picked at random from a bank of 97, so each attempt is different.
You have 30 minutes. The quiz submits automatically when time runs out.
You need 75% to pass.
0.25 mark(s) are deducted for each wrong answer.
You can mark questions for review and return to them before submitting.
Correct answers and explanations are shown after you submit.

Sample Questions & Answers

A preview of 12 questions from this quiz, each with the correct answer and a written explanation. Attempt the full, timed quiz to be scored and earn XP.

Question 1
What is the greatest number that divides 245 and 455 leaving remainder 5 in each case?
- 20
- 30 Correct answer
- 40
- 50
Explanation: Subtract 5 from both numbers: 240 and 450. Their HCF is 30, so the required number is 30.
Question 2
What is the least number which when divided by 12, 15 and 20 leaves remainder 7 in each case?
- 57
- 67
- 77 Correct answer
- 87
Explanation: The required number minus 7 must be divisible by LCM(12,15,20)=60. Thus the least number is 60+7=67.
Question 3
If 3/5 of a number is 42, what is 7/10 of the number?
- 49 Correct answer
- 56
- 63
- 70
Explanation: The number is 42×5/3=70; 7/10 of 70 is 49.
Question 4
The HCF of two numbers is 12 and their LCM is 420. If one number is 60, what is the other?
- 72
- 84 Correct answer
- 96
- 108
Explanation: Product of the numbers = HCF×LCM = 12×420. Therefore the other number is 5040/60=84.
Question 5
What is the smallest positive number divisible by 8, 12 and 18?
- 48
- 72 Correct answer
- 96
- 144
Explanation: LCM(8,12,18)=72.
Question 6
A number leaves remainder 3 when divided by 7. What remainder will twice the number leave when divided by 7?
- 3
- 5
- 6 Correct answer
- 1
Explanation: If n≡3 mod 7, then 2n≡6 mod 7.
Question 7
Simplify: 48 ÷ 6 × 4 + 12 − 5.
- 35
- 39 Correct answer
- 43
- 45
Explanation: Perform division and multiplication first: 48÷6×4=32; then 32+12−5=39.
Question 8
Simplify: (3/4 + 5/8) ÷ (7/8).
- 9/7
- 10/7
- 11/7 Correct answer
- 12/7
Explanation: 3/4=6/8, so the numerator is 11/8; (11/8)÷(7/8)=11/7.
Question 9
The ratio of A:B is 5:7. If their sum is 144, what is A?
- 50
- 55
- 60 Correct answer
- 65
Explanation: Total parts=12, so one part=12 and A=5×12=60.
Question 10
The ratio of boys to girls is 7:5. If 24 more boys are present than girls, how many students are there?
- 120
- 132
- 144 Correct answer
- 156
Explanation: Difference is 2 parts=24, so one part=12. Total 12 parts=144.
Question 11
If x:y=3:4 and y:z=8:9, then x:z is?
- 2:3 Correct answer
- 3:4
- 4:5
- 8:9
Explanation: Make y common: 3:4 becomes 6:8, so x:z=6:9=2:3.
Question 12
The average of 8 numbers is 27. If one number 41 is replaced by 25, what is the new average?
- 24
- 25 Correct answer
- 26
- 27
Explanation: The total falls by 16. New total=8×27−16=200, so the new average is 200/8=25.