How can you write nineteen in a manner that if we take out one, it becomes twenty?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

Take away the whole and some still remain. What is it?

A research team went to a village somewhere between the jungles of Africa. Luckily for them, they reached the day when quite an interesting custom was to be performed. The custom was performed once a year as they confirmed and was performed in order to collect the taxes from every male of the region.

The taxes were to be paid in the form of grains. Everyone must pay pounds of grain equaling his respective age. This means a 20-year-old will have to pay 20 pounds of grain and a 30-year-old will pay 30 pounds of grain and so on.

The chief who collects the tax has 7 weights and a large 2-pan scale to weigh. But there is another custom that the chief can weigh only three of the seven weights.

Can you find out the weights of the seven weights? Also, what is the maximum age of the man that can be weighed for the payment of taxes?

Which part of London exists in France as well ?

Why is 6 afraid of 7?

What can jump higher than a building?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?