Averages Quiz
Practice quiz on Averages (Numerical & Mental Ability). 10 exam-style questions with explanations.
About This Quiz
Averages Quiz — Questions with Solutions
All 10 questions from this quiz with the correct answer and explanation. Attempt them yourself first, then open each solution to check your reasoning.
Q1.The average of 10, 20, 30 is
- A.30
- B.20
- C.25
- D.15
Show answer
Answer: B. 20
60/3.
Q2.The average of first five natural numbers is
- A.3
- B.2.5
- C.5
- D.3.5
Show answer
Answer: A. 3
15/5.
Q3.The average of 5 numbers is 12. If one number is excluded, the average becomes 10. The excluded number is
- A.16
- B.18
- C.20
- D.22
Show answer
Answer: C. 20
60 - 40.
Q4.The average age of 4 persons is 25 years. The sum of their ages is
- A.125
- B.100
- C.75
- D.50
Show answer
Answer: B. 100
4 x 25.
Q5.The average of 8 numbers is 15. If 3 is added to each number the new average is
- A.45
- B.18
- C.12
- D.15
Show answer
Answer: B. 18
15 + 3.
Q6.The average of 7 consecutive numbers is 20. The largest of them is
- A.24
- B.27
- C.23
- D.26
Show answer
Answer: C. 23
Middle 20; largest 23.
Q7.The average of 6 numbers is 30. The sum of the first 5 is 140. The sixth number is
- A.30
- B.50
- C.40
- D.20
Show answer
Answer: C. 40
180 - 140.
Q8.A batsman's average after 10 innings is 40. He scores 62 in the 11th innings. The new average is
- A.44
- B.40
- C.41
- D.42
Show answer
Answer: D. 42
(400+62)/11 = 42.
Q9.The average of 11 numbers is 50. The average of the first 6 is 49 and of the last 6 is 52. The sixth number is
- A.50
- B.56
- C.52
- D.46
Show answer
Answer: B. 56
294 + 312 - 550 = 56.
Q10.The average of two numbers is 15 and one of them is 12. The other is
- A.21
- B.15
- C.18
- D.12
Show answer
Answer: C. 18
30 - 12.
Frequently Asked Questions
Is Averages Quiz free to attempt on AajExam?
Yes. Averages Quiz is completely free. You only need a free AajExam account to track your score, view detailed solutions and unlock cross-attempt analytics.
How long does it take to complete Averages Quiz?
Averages Quiz runs on a 10-minute timer in real exam-style conditions. The clock starts the moment you click Start, mirroring the time pressure of the actual exam.
Are detailed solutions provided?
Yes. Every question on Averages Quiz ships with a complete step-by-step solution, the underlying concept, and (where applicable) shortcut tricks. You can also discuss any question with the AajExam community.
Can I attempt Averages Quiz multiple times?
Yes. You can attempt this quiz as many times as you like. Each attempt is recorded separately so you can track improvement in score, accuracy and time-management.
Which government exams does this quiz prepare me for?
Average questions appear regularly in SSC CGL, CHSL, MTS, GD; IBPS PO, Clerk; SBI PO, Clerk; RRB NTPC, Group D; UPSC prelims and most State PSC exams. The specific weightage varies by exam — check the exam pattern on the corresponding AajExam exam page for details.