Quantitative Aptitude - Arithmetic Ability Questions

If in ΔABC, DE ||BC, AB = 7.5cm, BD = 6cm and DE = 2cm, then the length of BC in cm is

What is the diameter (in cm) of a sphere of surface area 154 sq cm?

Simple interest on a sum of Rs 3300 for 5 years is Rs 1980. What is the annual rate (in percentage) of interest?

In the following question, select the odd letter from the given alternatives.

If 4x + 3y = 11 and 3x + 2y = 8, then (x,y) is

In the given figure, the angle bisectors of B and C of an isosceles triangle intersect at point O. Find the angle BOC (in degree), when ∠ABC = ∠ACB = 75°.

The sum of 10 terms of the arithmetic series is 390. If the third term of the series is 19. Find the first term

72% of a number is 90. What is the number?