Math Quiz on Average
Ans: 79
Q2. The average age of 3 children of Poonam Singh is 12 years and their ratio of ages is 3:4:5. The average age of the youngest and eldest child is –
Ans: 12 years
Q3. What is the average of 7 consecutive odd numbers if the smallest of those numbers is denoted by ‘k’?
Ans: k+6
Q4. The average of 1000.0001, 100.001, 10.01 and 1.1 is
Ans: 277.777
Q5. 123 typists typed 984 papers in 1/15 hour. The number of papers typed per minute by an average typist is-
Ans: 2 papers
Q6. The average of a and b is 400 and the average of c and d is 600 the average of a, b, c, and d is
Ans: 500
Q7. The average weight of liquid in 100 bottles is 500 gm. The total weight of all the bottles is 20 kg. The average weight of a bottle with liquid is-
Ans: 0.7 kg
Q8. The average of a, 11, 23 and 17 is 15 and average of a, b, 12, and 25 is 16. The value of a/b is-
Ans: 1/2
Q9. The average age of 10 students in a class is 20 years, if a new student is also included, then the new average age of all the students’ increases by 1 year. The age of the students is
Ans: 31 years
Q10. The average of all the prime and composite numbers up to 100 is-
Ans: 51