Which flower has two lips?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

When it is alive we sing, when it is dead we clap our hands. What is it?

I know a nine-letter word having only one vowel.
Do you ?

It is always ahead of me yet I can never see it. What is it?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

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

What is the difference between a jeweller and a jailer?