There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Two fathers and two sons decided to go to a shop and buy some sweets upon reaching. Each of them bought 1 kg of sweet. All of them returned home after some time and found out that they had 3kg of sweets with them.

They did not eat the sweets in the way, nor threw or lose anything. Then, how can this be possible?

I look at you, you look at me, I raise my right, you raise your left. What am I?

Move four matchsticks to the below square to form three squares?

Which fur should we be getting from the Lion?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What's the best place to go shopping in the ocean?