The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and difference of the digits of the number if the ratio between the digits the number is 1 : 2?

X, Y and Z jointly started a business. It was agreed that X would invest Tk 6,500 for 6 months, Y, Tk 8,400 fo...

Let N be the greatest number that will divide 1305, 4665 and 6905, leaving the same remainder in each case. Th...

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the t...

Albert invested an amount of Tk 8,000 in a fixed deposit scheme for 2 years at compound interest rate 5% per a...

Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. A...

A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round...