Quantitative Aptitude - Arithmetic Ability Questions

Simple interest on a sum for 10 years is equal to 5% of the principal. In how many years interest will be equal to the principal?

The perimeter and the breadth of a rectangle are 82 cm and 20 cm respectively. Calculate the length of its diagonal (in cm).

Product of digits of a 2-digit number is 18. If we add 63 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.

The 3rd and 6th term of an arithmetic progression are 19 and 37 respectively. What is the 13th term?

If the lengths of the two parallel sides of a trapezium are 4 cm and 6 cm and its area is 25 cm². Find the distance between its parallel sides (in cm).

The amount of extension in a spring is proportional to the weight hung on it. If the weight of 5 kgs produces an extension of 0.4 cm, what weight would produce an extension of 5cm?

What is the circumference (in cm) of a circle whose area is 616 sq cm?

If O is the centroid and AD, BE and CF are the three medians of Δ ABC with an area of 96 cm2 then the area of Δ BOD in cm2 is