If a+b = 7 and √ (b2 ├»┬┐┬¢ 9)= 4 find 'a'

When a number 'x' is divided by '4' we get the cube of another number, y. Find x if y3<10

If the diameter of a circle is doubled, its area is increased by ------ times.

Which is the next in the series ? 3,13,31,57, --------

If A = B/2; B = C2/2 and C = 2√3 Which is A of the following ?

If A means +, B means -, C means x and D means /, then the value of 18C14A6B16D4 is :