Quantitative Aptitude - Arithmetic Ability Questions

What is the sum of the first 17 terms of an arithmetic progression if the first term is -20 and last term is 28?

The average of ten numbers is 18. If one number is removed, then the average becomes 16, then what is the removed number?

Pipe A can fill an empty cistern in 4 hours while along with Pipe B it can fill it up in 3 hours. Only Pipe A is turned on for an hour after which Pipe B is also turned on. How much total time will it take to fill up the cistern?

If 7 spiders make 7 webs in 7 days , then 1 spider will make 1 web in how many days ?

In ΔPQR, ∠QPR = 45° and the bisectors of ∠PQR and ∠PRQ meets at O. What is the value (in degrees) of ∠QOR?

The curved surface area and the diameter of a right circular cylinder are 352 cm² and 14 cm respectively. Find its height (in cm).

The average of three numbers is 6. The average of the first two is 5 while the average of the last two is 8. The three numbers are:

The ages of A and B differ by 16 years. If 6 years ago, the elder one was 3 times as old as the younger one, find the present age of the younger between A and B?