In the following question, select the odd number pair from the given alternatives.
5, 11, 21, 43, 85, ?

Abhinav leaves Mumbai at 6 am and reaches Bangalore at 10 am Praveen leaves Bangalore at 8 am and reaches Mumbai at 11:30 am. At what time do they cross each other?

B is 20% more efficient than A. A started the work and work for x days and then A is replaced by B. B completed the remaining work in x+8 days. Ratio of the work done by A and B is 2:3. In how many days A and B working together can complete the whole work?

The ratio of speeds of A is to B is 2:3 and therefore A takes 20 minutes less time than B takes. What is the ratio of time taken by A and B?

A is twice fast as B and B is thrice as fast as C. The journey covered by C in 78 minutes then time taken by A to cover the same journey is-

The ratio between heights of two-cylinder is in the ratio of 3:5. Their volumes are in the ratio 27:80. Find the ratio between their radius.

If the ratio of speed of train, car and bus is 6:5:3 and bus cover a distance of 240 km. in 4 hours. What is the difference between speed of the train and car?

A vessel contains some litres of pure milk. If 25 litre of water is added to the vessel, then ratio between milk and water becomes 12:5, 17 litres of mixture is drawn from the vessel and 10 litre of water is added to the mixture. Find the new ratio between milk and water.