Direction (66-70): What should come in place of the question mark(?) in the following number series?

7, 8 , 17, 42, ?

Direction (66-70): What should come in place of the question mark(?) in the following number series?

8, 39, 155, 464, ?

A 160-meter-long train running at a speed of 90 km/h crosses a platform is 18 s. What is the length of the platform in metre?

What is the average of the following numbers?
38, 92, 45, 25, 60

Mohan purchased an article and sold it for Rs 2817.50 and earned 15% profit on the cost price. What was the cost price of the article?

The ratio between the boys and girls in a class is 6:5 respectively. If 8 more boys join the class and two girls leave the class then the respective ratio become 11:7. What is the number of boys in the class now?

What will be the difference between the compound interest and simple interest at the rate of 5% per annum on an amount of Rs 4000 at the end of 2 year?

Which of the following has the fractions in descending order?