Quantitative Aptitude - Arithmetic Ability Questions

Which of the following numbers is a perfect square?

Two numbers are 10% and 20% lesser than a third number respectively. By how much percent is the second number should be enhanced to make it equal to the first number?

A bus is running at a speed of 90 kmph. What distance will it cover in 20 seconds?

A, B and C can do a job working alone in 6, 9 and 18 days respectively. They all work together for 1 day, then A and B quit. How many days C working alone will take to complete the remainder of the job?

The simplified value of 3-212-18 - 13 × 27 - 12 x 273 is closest to

The areas of two similar triangles ΔXYZ and ΔPQR are 100 sq cms and 25 sq cms respectively. If PQ = 4 cm then what is the length of XY (in cm)?

A merchant marked cloth at Rs. 50/metre . He offers 2 successive discounts of 15% and 20%. The net price/metre is

2 ­- (cosA + sinA)2 is equal to