The total age of A and B is 12 years more than the total age of B and C. C is how many years younger than A ?

The simple interest on a sum of money will be TK. 600 after 10 years. If the principal is trebled after 5 year...

If the compound interest on a sum for 2 years at 12.5% per annum is TK. 510 the simple interest on the same at...

0.01 is what percent of 0.1 ?

Sixty-five percent of a number is 21 less than four-fifth of that number. What is the number ?

An article when sold at a gain of 5% yields TK. 15 more than when sold at a loss of 5% . Its cost price would...

An express train travelled at an average speed of 100 km/hr, slopping for 3 minutes after every 75 km. How lon...