Quantitative Aptitude - Arithmetic Ability Questions

If Sec θ = 13/12, then what is the value of Sin θ?

If a + b = 5 and ab = 6, then what is the value of a3 + b3?

A man is 3 years older than his wife and four times as old as his son. If the son becomes 15 years old after 3 years. Then what is the present age of the wife?

What will be the sum of the measures all the interior angles of a polygon having 14 sides?

The average of 10 numbers is X and one of the number is 38. If 38 is replaced with 19, then what will be the new average?

The average of first 20 multiples of 12 is

A 800 metres long train is running at the speed of 90 km/hr. If it crosses a bridge in 50 seconds, then what is the length (in metres) of the bridge?

What is the value of Sin 60° + (1/2)Cosec 45°?