Quantitative Aptitude - Arithmetic Ability Questions

Vishal is 20 years younger to Arya. Twelve years hence Arya's age will be 1.25 times that of Vishal. Aryais now ......... years old.

A boat is sailing towards a lighthouse of height 20√3 m at a certain speed. The angle of elevation of the top of the lighthouse changes from 30° to 60° in 10 seconds. What is the time taken (in seconds) by the boat to reach the lighthouse from its initial position?

If sin ­- 5π/3 = x, then the value of x is

If 3x+22x+1 = a2x+1+bx+2 be an identity, then the value of b

Δ DEF is right angled at E. If m∠F = 45°, then what is the value of 2 Sin F x Cot F?

The ratio of the number of marbles that Joyee and Minati had was 5 : 8 while the ratio of the number of marbles that Jacob and Minati had was 7 : 12. What is the ratio of the number of marbles that Joyee and Jacob had?

Reflection of the point (2,­7) in the y­axis is

What is the value of sin(11π/6)?