৭৬১৬
What is the least number which when tripled is exactly divisible by 10, 12, 15, and 18?
উত্তর
60
৭৬১৭
Average age of 15 students of a class is 15 years. Out of these the average age of 5 students is 14 years and that of the other 9 students is 16 years. The age of the 15th student is-
উত্তর
11 years
৭৬১৮
Sachin is younger than Rohan by four years. If their ages are in the respective ratio of 7 : 9, how old is Sachin?
উত্তর
14 years
৭৬১৯
If P and Q together can complete a piece of work in 16 days and P alone in 24 days, in how many days can Q alone complete the work?
উত্তর
48 days
৭৬২০
A motorboat, whose speed in 18 km/h in still water goes 36 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream is-
উত্তর
6 km/h