Quantitative Aptitude - Arithmetic Ability Questions

Find two numbers such that their mean proportion is 12 and third proportion is 768.

Mukesh got series of discount 30%, 25%, 15% on his shirt. Find out the single equivalent discount.

The average marks obtained by a group of 10 students were 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.6. What were the average marks obtained by the student who left and the one who joined?

What is the simplified value of tan (θ/2) + cot (θ/2)?

A train 100 m long is running at a speed of 120 kms/hr. The time taken to pass a person standing near the line is

A shopkeeper marks the price of an article at Rs. 320. Find the cost price if after allowing a discount of 10%, he still gains 20% on the cost price.

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?

A and B can do a piece of work in 18 days, B and C in 24 days, A and C in 36 days. Working together they can do the work in