The ratio of the number of male and female teachers in a school is found to be 2 : 3. If there are 20 male teachers, the number of female teachers are
Coefficient of y in - 3xy + 5 is
A man sold a horse for Rs. 360 losing 4 % of the cost price. How much does he pay for the horse?
Area of a room is 400 sq. m. If the length of tile is 20 cms. and breadth is 10 cm., the number of tiles required is
x2- 12x + 36 is equal to
The supplement of right angle is always