Quantitative Aptitude - Arithmetic Ability Questions

Which of the following numbers is composite?

Sonam's age after eight years will be half of her father's age. Eight years ago the ratio of their ages was 1 : 3. Find the present age of Sonam's father.

(−12)[11+7×(−3)]÷{}[413−(−3)×(−6)]=

If (a+1a)2=3,then the value of a6-1a6 will be

The angles of elevation of the top of a temple, from the foot and the top of a building 30 m high, are 60° and 30° respectively. Then height of the temple is

Two circles of same radius intersect each other at P and Q. If the length of the common chord is 30 cm and distance between the centres of the two circlesis 40 cm, then what is the radius (in cm) of the circles?

Which of the below given fractions is NOT equal to 9/17?

Select the odd word/letters/number/number pair from the given alternatives.