The more of this there is, the less you see. What is it?

Solve the equation in the image by looking at the pattern closely.

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?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Can it be possible to build a house that has all its four walls facing towards the South?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?