What has to be broken before you can use it?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

What kind of band never plays music?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

Why do people go to bed?

If six children and two dogs were under an umbrella, how come none of them got wet?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

What does this rebus mean?

O
N
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TIME

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?