When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Which tank will fill first?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

If your uncle’s sister is not your aunt, what relation is she to you?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

Count the number of triangles in the picture below:

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