Dear Students, SSC has released the notification for CGL 2017. This time again the competition is going to be very stiff. Questions from Quant are asked in Tier-1 and Tier-II as well. Hence, you need to focus on this subject more. The only trick to master Quant is “practice‘. So, Practice daily. We are providing topic-wise quant quizzes, solve, learn, succeed.
Q1. Find the average of first 60 even numbers?
Q2. Find the average of first 30 multiples of 3?
Q3. Find the average of all the prime numbers between 20 and 50?
Q5. The average of three numbers is 56. If the first number is half of the second and the 3rd number is twice the second, then the second number is—
Q7. The average weight of 10 people increases by 1.5 kg. if a man whose weight is 65 kgs is replaced by another man. What is the weight of the new man?
(a) 80 kgs
(b) 73 kgs
(c) 75 kgs
(d) 74 kgs
Sol. Total increase in weight
= 1.5 × 10
= 15 kg.
Weight of new person
= 65 + 15
= 80 kg
Q8. The average age of 3 friends is 63. If the age of 4th friend is added, their average age remains 63. What is the age of the 4th friend?
(a) 22 yrs
(b) 63 yrs
(c) 24 yrs
(d) 25 yrs
Q9. In a school, the average age of students is 6 years, and the average age of 12 teachers is 40 years. If the average age of the combined group of all the teachers and students is 7 years, then the number of students is
Q10. The average of runs of a cricket player of 10 innings was 32. How many runs must he score in his next innings so as to increase his average of runs by 5?
Sol. The required sum
= 32 + (11 × 5)
Q11. A cricketer gives 12.4 runs per wicket. He gives 26 runs and takes 5 wickets in a match after which his average becomes 12 per wicket. How many wickets had been taken till the last match?
Q12. Five years ago the average age of husband and wife was 23 years. Today the average age of husband, wife, and child is 21 yrs. How old is the child?
(a) 3 yrs
(b) 7 yrs
(c) 12 yrs
(d) 2 yrs
Q13. In a class 20% students failed, 60% students secured average marks and the remaining students scored above average marks. How many students are there in the class?
(d) Can’t be determined
Sol. Can’t be determined
Q14. 13 chairs and 5 tables were bought for Rs. 8280. If the cost of a table be Rs. 1227, what is the average cost of a chair?
(a) Rs. 165
(b) Rs. 175
(c) Rs. 185
(d) Rs. 225
Q15. In a committee, the average age of 8 people increases by 2 yrs when two people whose age were 35 years and 45 years are replaced by two women. Find the average age of the two women?
(a) 48 yrs
(b) 45 yrs
(c) 44 yrs
(d) 43 yrs
Sol. The average age of 8 members increases by 2 years.
This means total age increases by 8 × 2 = 16 years
The sum of the ages of two women are = 35 + 45 + 16 years
= 96 years
Hence their average age = 96/2
= 48 years
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