I look at you, you look at me I raise my right, you raise your left. What am I?

How many sides does a circle have?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

Which is heavier: a ton of bricks or a ton of feathers?

How many words can a pen with half refill write?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

In order to complete the racing competition, the Mexico racetrack has to submit its top and the most famous three horses to win the competition. Due to an electrical storm, all the records are cleared and no one knows which horse holds the record. They all look identical and it becomes even more difficult to differentiate the horses. There are 25 horses in the Mexico racetrack. But there can be only five horses at a time on the track. What will the least number of races that can be conducted to find out the three fastest horses?