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Interview Mental Math - 6

### Interview Mental Math - 6 1. A bicycle costing Rs.600 is sold at Rs.570. What is the loss percentage? a. 5% b. 11.1% c. 25% d. 10% 2. 5 years ago, khalid was 10 years older then Ali. What is the difference between their ages at present? a. None is correct b. 15 c. 5 d. 10 3. If 3 men or 6 boys can do a piece of work in 10 days, how many days will 5 men and 10 boys takes to do the same work? a. 5 b. 6 c. 4 d. 3 4. Ali is 1 years older than Asif, sum of their ages is 21 years, find their ages? a. Ali 8 years, Asif 13 years b. Ali 11 years, Asif 10 years c. Ali 11 years, Asif 10 years d. Ali 10 years, Asif 11 years 5. What is 40% of 40? a. 16 b. 24 c. 12 d. 20 6. A shopkeeper purchased 10 kg of sugar for Rs.250. For earning a profit of 12% he should sell the sugar at the rate of? a. Rs.27/kg b. Rs.27.5/kg c. Rs.29/kg d. Rs.28/kg 7. The average of five numbers is 6. After one of the numbers is removed, the average of the remaining numbers is 4. What number has been removed? a. 24 b. 10 c. 2 d. 31 8. A Father is twice as old as his son. Sum of their ages is 60 years. Find the age of son?  a. 28 years b. 20 years c. 25 years d. 16 years

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