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

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

Find the missing number in the image below.

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Replace the question mark with the correct number in the below-given picture?

What number do you get when you multiply all of the numbers on a telephone's number pad?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Can you decipher the below rebus?

PBLUESAISNUERSES

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?