If =-2x² + 12x, B=11 - 8x + 3x², C = 17 - 4x² and D = x² - x - 3 then what is the sum of the co-efficients of x² and x in ?

Find the smallest number which when increased by 20 is completely divisible by 12, 20, 15, 18 and 24.

If the price of rice increases by 20% and a person reduces its consumption by 20%, by what percentage will his total expenditure on rice decrease?

If the mean proportional of A and 27 is 18, then find the value of A.

If 30% of a number exceeds 20% of it by 24, then the number is:

The number of prime numbers lying between 300 and 305 is:

Find the smallest number which when increased by 20 is completely divisible by 12, 20, 15, 18 and 24.

If the price of rice increases by 20% and a person reduces its consumption by 20%, by what percentage will his total expenditure on rice decrease?

If the mean proportional of A and 27 is 18, then find the value of A.

If 30% of a number exceeds 20% of it by 24, then the number is:

The number of prime numbers lying between 300 and 305 is: