If a sum of money at certain rate of interest doubles in 5 years and at a different rate of interest becomes 3 times in 12 years, the better rate of interest is

H.C.F. of two polynomials is a + 5 and their L.C.M. is (a + 5) (a + 4) (a – 1). If one of the polynomial is a²+ 4a – 5,then the other polynomial is

The sum of X and Y's age is 105. When X was Y's age, she was 1.5 times Y's age then what are their present ages?

If x = 1 – q and y = 2q + 1, then for what value of q, x is  equal to y?

If k – 7 = 7 (1 – k), then what is the value of k?

If r varies directly as n and r/m = 10, then what is the value of r when m = 2.2?

[148-{28-58}]≥(?)

Simplify the expression (1+i)⁶+(1+i)⁴ .

6(3 – x) –5 (2x – 4) = 4(3x–) + 14
In the above equation the value of x is:

The number of solutions of x² - 5|x| + 6 = 0 is