If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

What breaks yet never falls, and what falls yet never breaks?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

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?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?