I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

Can you count the number of triangles in the given picture?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

What does an Island and the letter T have in common?