NRBC Math WRITTEN Question Bank, Complete Solution & PDF

On average, the bottle-nosed dolphin comes up for air once every two minutes; the beluga whale, close relative, comes up for air on average once every five minutes. The number of times a bottle-dolphin would come up for air in a 24 hour period is approximately what percent greater than number of times a beluga whale would come up for air in that same period?

One pump drains one-half of a pond in 3 hours, and then a second pump starts draining the pond. The two pumps working together finish emptying the pond in one and half hour. How long would it take the second pump to drain the pond if it had to do the job alone?

A rectangular box that is 7 inches long by 4 inches wide by 3 inches deep is carefully packed to th hold the maximum number of blocks that are 1 inch by 1 inch by 2 inches. How many blocks can be packed into the box?

A certain business produced x rakes each month from November through February and shipped $\frac{x}{2}$ rakes at the beginning of each month from March through October. The business paid no storage costs for the rakes from November through February, but it paid storage costs of $0.10 per rake each month from March through October for the rakes that had not been shipped. In terms of x, what was the total storage cost, in dollars, that the business paid for the rakes for the 12 months from November through October ?

The total price of Cricket bat and ball is 1,350. If the price of bat increases 25% and the price of ball decreases 20% then the total price of bat and ball remains same. Find the prices of bat and ball?

Mr. Karim borrowed Tk. 500 at 5% simple interest per year. After some time, he borrowed Tk. 400 at 3$\frac{1}{2}$% simple interest per year for the second time. Six months after the second time borrowing, he repaid both the borrowed money along with interest and the amount repaid was Tk. 994.50. How many years after the first time borrowing Mr. Karim repaid the borrowed money?

A team of 2 men and 5 women completed one-fourth of a job in 3 days. After 3 days another man joined the team and they took 2 days to complete another one-fourth of the job. How many men can complete the whole job in 4 days?

The cost of two watches taken together is Tk. 840. If, by selling one at a profit of 16% and the other at a loss of 12%, there is no loss or gain in the whole transaction, find the cost of each of the two watches.

The perimeter of a square field is equal to the perimeter of a rectangular field. Length of the rectangular field is 3 times of its width and the area 768 square meter. How many square sized tiles of 80 centimeter wide will be required to cover the square field?

A, B and C can complete a piece of work in 16, 32 and 48 days, respectively. They started working together but C left after working 4 days and B left 2 days before the completion of the work. How many days it took in total to complete the work?