Quantitative Aptitude - Arithmetic Ability Questions

Average of 31 numbers is 19. If the average of first 8 numbers is 24, then what is the average of the remaining numbers?

The average revenues of 13 consecutive years of a company is Rs 78 lakhs. If the average of first 7 years is Rs 73 lakhs and that of last 7 years is Rs 85 lakhs, what is the revenue for the 7th year?

A train runs at 80 kmph for the first 40 km and the next 30 km at 60 kmph. Find the average speed.

The ratio of the cost price and selling price of an article is 5 : 3. What is the loss percentage?

If in 2 years at simple interest the principal increases by 18%, what will be the compound interest (in Rs) earned on Rs 7000 in 3 years at the same rate?

The mean of a distribution is 20 and the standard deviation is 4. What is the value of the coefficient variation?

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.

If 22, x, 88 are in a continued proportion, find the value of x.