Which five letter word can be added at the end of below word to form a
valid word?

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What is the word or phrase below?
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I have an eye but still cannot see.

Who am I?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

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

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