What is more useful when it is broken?

Can you count the number of squares in the given picture?

What can you hold in your right hand, but never in your left hand?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

What brings you down but never up?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

Which is Odd One Out and why?

4377

3954

9862

8454

9831