The average age of six members of a family is 40 years. If the age of a guest is included, then the average age increases by 12.5%. What is the age (in years) of the guest?

The following table shows the number of laptops sold from five different stores in a city on five days of a given week.

What is the ratio of the total number of computers sold from store S on Tuesday, Monday and Sunday taken together to that sold from store P on Tuesday, Wednesday and Thursday taken together?

What is the compound interest on ₹24,000 for 2 years at the rate of 10% per annum, if interest is compounded annually?

A person deposited ₹15,600 in a fixed deposit at 10% per annum simple interest. After every second year he adds his interest earned to the principal. The interest at the end of 4 years is:

A boat covers a certain distance against the stream in 9 hours 36 min and it covers the same distance along the stream in 6 hours. What is the ratio of the speed of the boat in still water to that of the stream?

The price of a variety of a commodity is ₹7/kg and that of another is ₹12/kg. Find the ratio in which two varieties should be mixed so that the price of the mixture is ₹10/kg.

If secθ + tanθ = 3, then the value of secθ is:

Table below shows the number of candidates appearing for the interview and the percentage of candidates found eligible for the post in various companies (A, B, C, D, E, F).
Study the Tables and give answer the following Questions.

How many qualified candidates are there in Company D?