The number of different signals which can be given form 6 flags of different colours taken one or more at a time is

The number of parallelograms that can be formed from a set of four parallel lines intersecting another set of...

Bus fare recently was increased form Taka 0.85 to Taka 1.00 what was the approximate percentage of increase?

The next number in the sequence , 3, 6 m 11, 18, 27, .... is

By how much is the value of { -10 - (-7) } greater than the value of { -10 + (-7) } ?

f(x) = -1, for all x>0. If f(a) = -1 and f(ab) = -1 then b = ?

A wholesaler bought 1200 pens for TK 18 each . He sold 60% of the pens for TK. 30 each and remaining for TK. 1...