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

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

Can you quickly find which two matchstick figures are identical?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Can you fill the blank with the correct number?

6 30 870 756030 _____

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

Which point will the car reach to go out?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?