Maths Mcqs Practice Test

Question 1

A pupil’s marks were wrongly entered as 83 instead of 63. Due to the average marks for the class got increased by half. The number of pupils in the class is___________?

Accepted Answer

C. 40

Question 2

The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is___________?

Accepted Answer

C. 36.5

Question 3

If the arithmetic mean of seventy five numbers is calculated, it is 35. If each number is increased by 5, then mean of new number is___________?

Accepted Answer

B. 40

Question 4

In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the rate in the remaining 40 overs to reach the target of 282 runs?

Accepted Answer

A. 6.25

Question 5

The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next innings so as to increase his average of runs by 4?

Accepted Answer

D. 76

Question 6

The average of 35 students in a class is 16 years. The average age of 21 students is 14. What is the average age of remaining 14 students?

Accepted Answer

D. 19 years

Question 7

The average of five numbers is 27. If one number is excluded, the average becomes 25. The excluded number is__________?

Accepted Answer

D. 35

Question 8

A library has an average of 510 visitors on Sunday and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is___________?

Accepted Answer

D. 285

Question 9

A family consists of grandparents, parents and three grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of the family?

Accepted Answer

B. 31 5/7 years

Question 10

The average of five consecutive odd numbers is 61. What is the difference between the highest and lowest numbers?

Accepted Answer

C. 8

Question 11

The average of non-zero number and its square is 5 times the number. The number is__________?

Accepted Answer

A. 9

Question 12

The average of the two-digit numbers, which remain the same when the digits interchange their positions, is__________?

Accepted Answer

C. 55

Question 13

The average of first five multiples of 3 is____________?

Accepted Answer

B. 9

Question 14

Find the average of all the numbers between 6 and 34 which are divisible by 5.

Accepted Answer

B. 20

Question 15

The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?

Accepted Answer

D. 19

Question 16

Sarfaraz obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, Mathematics, Physics, Chemistry and Biology. What are his average marks?

Accepted Answer

D. None of these

Question 17

A total of 3000 chocolates were distributed among 120 boys and girls such that each boy received 2 chocolates and each girl received 3 chocolates. Find the respective number of boys and girls?

Accepted Answer

B. 60, 60

Question 18

Rs. 6000 is lent out in two parts. One part is lent at 7% p.a simple interest and the other is lent at 10% p.a simple interest. The total interest at the end of one year was Rs. 450. Find the ratio of the amounts lent at the lower rate and higher rate of interest?

Accepted Answer

A. 5 : 1

Question 19

A trader purchased two colour televisions for a total of Rs. 35000. He sold one colour television at 30% profit and the other 40% profit. Find the difference in the cost prices of the two televisions if he made an overall profit of 32%?

Accepted Answer

A. Rs. 21000

Question 20

The average weight of a group of persons increased from 48 kg to 51 kg, when two persons weighing 78 kg and 93 kg join the group. Find the initial number of members in the group?

Accepted Answer

C. 23