Quantitative Aptitude - Arithmetic Ability Questions

Find the mean proportional between 2 and 98?

The value of x for which the expressions 15 ­ 7x and 15x + 7 become equal is _____.

If X is a prime number, LCM of X and its successive number would be

The base of a prism is in the shape of an equilateral triangle. If the perimeter of the base is 18 cm and the height of the prism is 20 cm, then what is the volume (in cm3) of the prism?

Z’s present age is 55 years. If 11 years ago, C’s age was 1/11 of Z’s age, then after how many years C’s age will become 37 years?

The age of Dr. Pandey is four times the age of his son. After 10 years , the age of Dr. Pandey will be twice the age of his son . The present age of Dr. Pandey's son is

For what value of X, 211X will be a perfect square?

In ΔPQR, S and T are points on side PQ and PR respectively. ST is parallel to QR. If S divides PQ in the ratio 4:1 and length of QR is 15 cm,what is the length of ST?