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Interview Mental Math - 14

Interview Mental Math - 14


Interview Mental Math
1. The average weight of 22 students in a class is decreased by 500 grams when one of the students who weights 40 kg is replaced by a new boy. What is the age of new boy?

a. 42 kg
b. 39 kg
c. 29 kg
d. 51 kg
Interview Mental Math
2. Two numbers have a sum of 20. If one number is 2 more than the other, what is the smaller number?

a. 10
b. 8
c. 11
d. 9
Interview Mental Math
3. A bicycle costing Rs.600 is sold at a loss of 5 percent. What is the sale price?

a. Rs.571
b. Rs.569
c. Rs.570
d. Rs.565
Interview Mental Math
4. The mean of 3 numbers is 4 and the mean of another 3 is 6. The mean of all 6 numbers is?

a. 6
b. 7
c. 5
d. 6
Interview Mental Math
5. Smaller number is 8 less than the larger number. Their sum is 24. The smaller number is?

a. 8
b. 9
c. 12
d. 16
Interview Mental Math
6. If I gain 25 percent, by selling a book for Rs.4 What is my cost price?

a. Rs.2.5
b. Slightly Less than Rs.3
c. Slightly More than Rs.3
d. Rs.3
Interview Mental Math
7. The average of four numbers is 25. After one of the numbers is removed, the average of the remaining numbers is 32. What number has been removed?

a. 1
b. 4
c. 31
d. 2
8. Click the correct answer. Do not use a calculator:.7 x 9 = ?
Interview Mental Math a. 49
b. 56
c. 54
d. 63



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