Which is the smallest number that you can write using all the vowels exactly once?

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?

Spot the cat in the picture below

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Can you find the 09 errors in the picture below?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

Solve the mathematical equation in the picture below.

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

What does the below rebus puzzle mean?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H