Find the number of squares in the below-given picture.

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Name a key which is hardest to turn.

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

You have 1023 apples and 10 bags. You have to distribute these apples in these 10 bags in any way you choose. But when I ask for a certain number of apples you have to give them in terms of bags without transferring the apples from other bags. How do you distribute the apples?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?