Replace the question mark with the number below given a simple math problem.

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Can you fill the blank with the correct number?

6 30 870 756030 _____

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

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?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

Find the next number in the series.
1 10 24 43 67 ?