Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Why do you find that most of the buildings are deprived of the 13th floor?

What part of the chicken has the most feathers?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

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

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

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?

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

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?