What do you call a fish without an eye?

Can you decipher the below rebus?

PBLUESAISNUERSES

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

I am quite hot but become too cold if you remove the first two letters. What am I?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

Can you solve below mathematical equation?

2^1234 - 2^1233

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

Why is 6 afraid of 7?