Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

Two men are in a desert. They both have packs on. One of the guys is dead. The guy alive has his pack open, and the guy who is dead has his pack closed. What is in the pack?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Which is the rope you never skip with?

Can you count the number of blocks in the picture below?

Can you find out the number of the parking space in which the car is parked?

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

Imagine you are in a room with no windows or doors. How will you get out?