Can you decipher the below rebus?

PBLUESAISNUERSES

What brings you down but never up?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

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

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?