Quantitative Aptitude - Arithmetic Ability Questions

ΔABC is right angled at B. BD is the altitude. AD is 18 cm and DC is 50 cm. Find length of BD?

Find the area (in sq units) enclosed by y = 0, x+6=0 and 2x-3y=6.

What is the value of x3-1x3+8 when 8x-8x-16=0 ?

If a - b = 4 and ab = -3, then what is the value of a3- b3?

Mukesh sells two shirts. The cost price of the first shirt is equal to the selling price of the second shirt. The first shirt is sold at a profit of 30% and the second shirt is sold at a loss of 30%. What is the ratio of the selling price of the first shirt to the cost price of the second shirt?

Find the remainder when 413 divided by 3?

A can do a work in 20 days and B in 10 days. If they work on it together for 5 days, then what fraction of work is left.

A group of boys has an average weight of 36 kg. One boy weighing 42 kg leaves the group and another boy weighing 30 kg joins the group. If the average now becomes 35.7 kg, then how many boys are there in the group?