What should come in place of the question mark '?' in the following number series?

8.5, 9.5, 21, 66, ?, 1345

What should come in place of the question mark '?' in the following number series?

6, 8, 11, 16, 23, ?

What should come in place of the question mark '?' in the following number series?

64, 62, 65, 60, 67, ?

A, B and C can complete a work in 10, 20 and 30 days respectively. If D can destroy the same work in 15 days. Find the time taken by all of them to complete the whole work.

The total sum of amounts of A and B at the end of 4 years and 2 years respectively on the same principal is Rs. 20,020. If A is charged Simple interest at the rate 10% and B is charged Compound interest at the rate 5%. The principal is?

If a shopkeeper increases the selling price of an article by 10% and gets a profit of 37.5% on its cost price. If he increases the selling price by 25% above on old selling price then he gets a profit of ₹ 225 on his cost price. Find the cost price of the article?

A boat starts travelling from point P, travels to point Q then returns to point P. The boat takes 12 hours to complete the journey. The speed of the stream is 5 km/hour and the speed of the boat in still water is 10 km/hour. What is the distance between P and Q?

Direction: Study the given pie chart carefully and answer the following questions accordingly. Given pie chart shows the percentage of players taking part in six different games in an event.

Total number of Players = 1800

If two - ninth of the players taking part in Boxing is female, then the number of male Boxing players is approximately what percentage of the total number of players taking part in Athletics?