Can you count the number of triangles in the picture below?

Can you name four days which start with the letter 'T'?

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?

You need to move three matchsticks to form three squares. Can you do it?

A tourist visits a small town for his research. While in the town, he decides to get a haircut. Since the town is quite small, there are only two barbers in the town � one on the North Street and one on the South Street. The barbershop on the North Street is a mess and the barber has a weird and pathetic haircut. While the barbershop at the South Street is pretty tidy and the barber as well has an impressive haircut.

Which barbershop will the tourist visit for his haircut and why?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

I don't get anymore wetter, no matter how much rain falls on me.

What is the coolest letter in the alphabet?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

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