Quantitative Aptitude - Arithmetic Ability Questions

P and Q together can make a door in 12 days. They started the work together but after 8 days P left the work. The remaining work is completed by Q alone in 7 more days. In how many days can P alone complete the entire work?

The difference between Peter and Preeti's ages is 5 years. When they married each other 35 years ago, 4 times Peter's age was the same as 5 times the age of Preeti. What is the current sum of their ages?

Which of the following numbers is not a prime number?

A sum becomes Rs 1392 in 2 years and Rs 1488 in 3 years at simple interest. What is the rate (in percentage) of interest per annum?

The ratio between Ram's age and Rahim's age is 10:11. What is the age of Rahim in percentage of Ram's age

Incentre of Δ ABC is I. ∠ABC = 90° and ∠ACB = 70°. ∠AIC is

If x = 5 + 15 - 1 & y = 5 - 15 + 1, then find the value of x2 - y2.

Two numbers are in the ratio 4:5 and their HCF is 13. Their LCM is