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

People make me, save me, change me, raise me. What am I?

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?

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

Decode below rebus
D
N
A
T
S , D

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Can you solve the maths in the below-given picture equation?