What has no start, end, or centre?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do 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 = ?

How can you leave a room with two legs and return with six legs?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

A car is crossing a 20 km-long bridge. The bridge can support at most 1500kg of weight over it. If somehow, the weight on the bridge becomes more than that, it will break.

Now, the weight of the car is exactly 1500kg. At the midway, a bird comes and sits on the roof of the car. This bird weighs exactly 200 grams.
Can you tell if the bridge breaks at this point or not?

Using eight eights and addition only, can you make 1000?

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

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

You can hear me, but you can't touch or see me.

What am I?