Jahir has 15 red balls; he gives Sami 3 balls. Sami now has twice the number of balls Jahir has left. How many balls did Sami have at the beginning?

When a number is divide by 5, the number is 3. If the square of this number is divided by 5, then what is the...

The value of -3-(-10) is how much greater than the value of -10-(-3)?

If a photocopier makes 2 copies in 1/3 second, at the same rate how many copies does it make in 4 minutes?

A pen is sold for taka 48 with a 20% profit. What is the purchase price of the pen?

A bank pays simple interest rate of 8% on investment. If you invest Taka 5,000 in the bank, how much money wou...

If the length and which of a rectangular garden plot were increased by 20%, what would be the percent increase...