Quantitative Aptitude - Arithmetic Ability Questions

Find the value of  x3 - y3, if x - y = 4 and xy = 12.

Three balls ring at intervals of 15, 30 and 45minutes respectively. At what time will they ring together again, if they rang simultaneously at 8.00 AM?

The length of the diagonal and the breadth of a rectangle is 13 cm and 5 cm respectively. Calculate its area (in cm²).

Fraction that lies between 2/5 and 4/9 is

Find the least number which must be subtracted from 18265 to make it a perfect square

Which smallest number must be subtracted from 400, so that the resulting number is completely divisible by 7?

If (9 - 3x) - (17x - 10) = -1, then the value of x is

Determine the value of ‘r’ for which the equation 13x + 5 = rx + 18 has no solution.