Look at the picture and find out which square is not linked with any of the other squares.

What Does this text mean:

important=important

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

What does the below image rebus riddle means ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What always comes into a house through the keyhole?

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

Three people enter a room and have a green or blue hat placed on their heads. They cannot see their own hat but can see the other hats.
The colour of each hat is purely random. They could all be green, blue, or any combination of green and blue.
They need to guess their own hat colour by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win $10,000 each, but if anyone guesses incorrectly they all get nothing.
What is the best strategy?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?