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

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

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.

You have two rectangular wires.

Both of them have property that when you light the fire from one end , it will take 60 minutes to get completely burn.

However, they do not burn at consistent speed (i.e it might be possible 1st 20% burn in 50 minutes and 80% can burn in 10 minutes).

So how could you measure 45 minutes ?

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?

Can you place six X (crosses) in below board without making three in a row in any way ?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Find the next number in the series.
1 10 24 43 67 ?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?