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?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

You see me once in June, twice in November, and not at all in May. What am I?

John is on an island and there are three crates of fruit that have washed up in front of him. One crate contains only apples. One crate contains only oranges. The other crate contains both apples and oranges.

Each crate is labelled. One reads 'apples', one reads 'oranges', and one reads 'apples and oranges'. He know that NONE of the crates have been labeled correctly - they are all wrong.

If he can only take out and look at just one of the pieces of fruit from just one of the crates, how can he label all of the crates correctly?

Solve the counting riddle by identifying the number of triangles in the given picture.

What word does this rebus represent?

meta meta
meta meta

If it took eight men ten hours to build a wall, how long would it take four men to build it?

What number comes next in the series?

5 15 5 18 5 24 14 20 _