If n and pare hotd odd numbers, which of the following must be an even number?

What fraction of an hour elapses between 11:40 p.m and 12:20 a.m?

A car wash centre washes 10 cars in half an hour. At this rate how many cars can it wash in 4 hours?

Sum of the two numbers is 21 and their difference is 7. What is the half of the greater number?

If x+y=6, y+z=4 and z+x=2, then 2y-z-x?

One third the sum of 13 and a certain number is the same as one more than twice the number. Find out the numbe...

Out of total profit, A gets 40%, B 25%, C 20%, D 10%, and E 5%. What percentage of A's profit is that of B?