Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

Move three sticks of the spiral below to form a square.

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 = ____

A B C D E F G H

These are the letters given to you. Now you have to find out the letter that comes two to the right of the letter which is immediately to the left of the letter that comes three to the right of the letter that comes midway between the letter two to the left of the letter C and the letter immediately to the right of the letter F.

What has one letter and starts with an E?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?