Mr. Jamal employed 50 workers to finish a work within 30 days. After 20 days he found out that only 50% of the work had been completed. How many additional workers will Mr. Jamal need to finish the work in time?

Arif incurred a loss of 25% by selling a used mobile phone set at taka 1500. How much could he gain/lose by se...

60% of the students of a college are male. 60% of the males in the college speak French and 40% of the student...

which of the following fractions is smaller than 8/9 and greater than 2/5?

There are 87 balls in a jar. Each ball is painted with at least one of two colors, red or green. It is observe...

There are 4 women and 4 men sitting in a waiting room for job. If two of the applicants are selected at random...

If x is the smallest positive integer such that 4410 multiplied by x is the square of an integer, then x must...