১৯০৬৬
A and B together can complete a work in 12 days. If A alone can complete it in 20 days, in how many days can B alone complete the work?
উত্তর
30 days
১৯০৬৭
If the length of a rectangle is increased by 20% and width is decreased by 10%, what is the net percentage change in area?
উত্তর
8% increase
১৯০৬৮
A sum of money doubles itself in 5 years at simple interest. What is the rate of interest per annum?
উত্তর
20%
১৯০৭০
The average of five numbers is 27. If one number is excluded, the average becomes 25. What is the excluded number?
উত্তর
35