Quantitative Aptitude - Arithmetic Ability Questions

If  tan2A / (secA -­ 1)2 = x, then the value of x is

What is the value of (3/5 + 7/9)?

In the given figure, AQ = 4√2 cm, QC = 6√2 cm and AB = 20 cm. If PQ is parallel to BC, then what is the value of PB (in cm) ?

If X is a prime number, LCM of X and its successive number would be

If the standard deviation of a population is 6.5, what would be the population variance?

X and Y are two alloys which are prepared by mixing zinc and aluminium in the ratio of 1 : 4 and 11 : 8 respectively. If equal quantities of alloys are melted to form a third alloy Z then what is the ratio of zinc and aluminium in alloy Z?

A product was sold foe Rs. 4,500 at a profit of 12.5%. What was the amount of profit?

K is 5 years older to H. H is 3 years younger to R. R is 6 years older to C. C is 7 years younger to L. Who is the eldest?