Quantitative Aptitude - Arithmetic Ability Questions

A mixture contains acid and water in the ratio of 7 : 3. If 4 litres of water is added to it, then the ratio of acid and water becomes 7 : 4. What is the quantity (in litres) of acid in the mixture?

What is the simplified value of (sec A + cos A)(sec A – cos A)?

Select the odd word/letters/number/number pair from the given alternatives.

What will be the value of a3+b3, if a2+b2=32 and a+b=8 ?

P and Q undertook to do a work for Rs 7200. P alone could do it in 20 days and Q alone in 12 days. With the assistance of R they finished the work in 5days. What is the share (in Rs) of R?

Select the odd word/letters/number/number pair from the given alternatives.

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

What is the sum of the first 11 terms of an arithmetic progression if the first term is -31 and last term is 29?