Can you make a six-letter word using the letters N, A and B ?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

I don't get anymore wetter, no matter how much rain falls on me.

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

Count the number of triangles in the picture below:

Can you solve below mathematical equation?

2^1234 - 2^1233

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

What time is it when an elephant sits on a fence?