Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

What can go up a chimney down, but can’t go down a chimney up?

Decode the below four famous ciphers:

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

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

What came first, the chicken or the egg?

A sundial has the fewest moving parts of any timepiece. Which has the most?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

Look at the picture and find out which square is not linked with any of the other squares.

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

What does this say?

XLR8