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

A container full of water weighs 18.5 kg. If one -fourth of the container is full of water , it weighs 6.5 kg...

A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory. Th...

If k is divisible by 2, 3 and 15, which of the following is also divisible by these numbers?

A restaurant meal costs Tk. 35.50 and there was no tax. If the tip was more than 10 percent but less than 15 p...

Barkat bought equal numbers of 2-paisa and 30-paisa stamps. If the total cost of the stamps was Tk. 10.00, wha...

Of two groups of tourists, each has 60 people. If three fourth (i.e. 75%) of the first group and two-third of...