If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Can you make a fire with just a single stick?

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?

Solve the puzzle by telling what does below picture means.

What has a ring but no finger?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?