A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Can you fill the blank with the correct number?

6 30 870 756030 _____

My sock drawer has 26 blue socks, 13 pink socks, 33 green socks, and 12 red socks, how many socks would I have to pull out in the dark to be sure I had a matching pair?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

You can move only two matchsticks in the given picture. What is the highest number you can form by doing it?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Can you find the 09 errors in the picture below?

Complete the following series. It.s very logical:

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