Quantitative Aptitude - Arithmetic Ability Questions

What is the area (in sq cm) of a circle whose circumference is 26.4 cm?

The least number that must be subtracted from 1294 so that the remainder when divided by 9, 11, 13 will leave in each case the same remainder 6 is:

What is the area (in sq cm) of a regular hexagon of side 6 cm?

The inradius of a equilateral triangle is 10 cm. What is the circum-radius (in cm) of the same triangle?

If a - b = 1 and ab = 6, then what is the value of a3- b3?

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

The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is:

Product of digits of a 2-digit number is 15. If we add 18 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.