Rearrange the letters in "new door" to make one word.

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

I shave every day, but my beard stays the same. What am I?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?