If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Count the number of triangles in the given picture.

Can you solve this picture maths equation?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

By using 'because' continuously three times, can you make an English statement ?