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Interview Mental Math - 16

### Interview Mental Math - 16

 1. In a class of 30 students, the average age is 10 years, if the teacher age is also included, the average age increases by one year. The teacherâ€™s age is?a. 54 years b. 32 yearsc. 51 yearsd. 41 years
 2. Combined age of two brothers is 20 years. I there is a difference of 2 years between their ages, find out the age of younger brother?a. 8 Years b. 11 Yearsc. 7 Yearsd. 9 Years
 3. What is the profit in percent, if a book costing Rs.100 is sold for Rs.110?a. 11.5% b. 10%c. 9%d. 11%
 4. Ali invested Rs.1000 for 1 year. At what rate he will get Rs.200 as a profit?a. 20% b. 22%c. 16%d. 11%
 5. The average of three numbers is 6. If the average of first two numbers is 7 then find the third number?a. 4 b. 3c. 3.5d. 4.5
 6. A bicycle costing Rs.570 is sold at Rs.600. What is the profit percentage?a. 4.75% b. 11.1%c. 5.25%d. 5%
 7. Click the correct answeDo not use a calculator: 35 + 18 = 29 + ?a. 21 b. 22c. 32d. 24
 8. What is 50% of 50?
 a. 20 b. 25c. 35d. 30

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