The average of 2, 7, 6 and x is 5 and the average of 18, 1, 6, x and y is 10. What is the value of y?
How many pieces of 85 cm length can be cut from a rod 42.5 meters long?
The least number which is a perfect square and is divisible by each of the numbers 16, 20 and 24, is :
১৬০০
৩৬০০
6400
14400
What decimal of an hour is a second?