For any two real numbers a and b.

a-b2+b-a2 is

Sum of factors of 4b2c2-(b2+c2-a2)2 is 

A cricketer, whose bowling average was 12.4 runs/wicket takes 5 wickets for 22 runs in a match, thereby decreases his average by 0.4. The number of wickets, taken by him before this match was:

The least number, which when divided by 5, 6, 7 and 8 leaves a remainder 3 in each case, but when divided by 9 leaves no remainder, is:

If one angle of a triangle is equal to half the sum of the other two equal angles, then the triangle is

The point equidistant from the vertices of a triangle is called its

If a+1a2=3,then the value of a2+1a2 will be

If 2x-2x=1 (x≠0),then the value of x3-1x3 is

How long does a train, 75 m long, moving at 60 km/hr take to pass a certain telegraph post?