What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Spot 5 differences in two Christmas tree below:

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

I can be cracked, made, told, and played. What am I?

The sum of a mother, her baby and her dog's weight is 170 Kg. How much does the baby weigh if the mother weighs 100 kg more than the combined weight of the baby and the dog, and the dog weighs 60 per cent less than the baby?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Solve this riddle by finding the odd one out from the rest.

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

What does does this rebus picture means ?