At a stationary shop, it costs Tk. 185 for 4 gel-pen, 8 ball -point pens and 1 marker pen and Tk. 315 for 7 gel-pens, 15 ball point pens and 1 marker pen. What would be the cost of 1 gel-pen, 1 ball -point pen and 1 marker pen?

The average of 10 numbers is 40.2. Later it is found that two numbers have been wrongly added. The first one i...

In a certain population group, 57% of the people have characteristics, X and 63% have characteristics Y. If ev...

M is older than N but younger than O. If m, n and o are the ages of M, N and O respectively, then which of the...

What is the smallest number of apples that can be distributed equally (without cutting any apple) among 6,10,1...

A merchant has 1000 kg of sugar, part of which he sells at 8% and the remaining at 18% profit. He gains 14% on...

If the numerator of a fraction is increased by 2 and the denominator by 1 it becomes 1. Again, if the numerato...