what does the below rebus means?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

What is the largest number you can write with just 3 digits?

Three people check into a hotel. They pay $60 for the rent of the room. After they check-in, the manager realize that the rent for the room is $55. So, he gives $5 to the bellboy and asks him to give it to them. The bellboy thinks that it will be difficult for the three people to share $5 among them and seeking the personal benefit, he pockets $2 and gives the remaining $3 to them.

Now, each person paid $20 and got back $1. In this manner, each of them paid just $19 which totals to the amount of $57. The bellboy has $2 with him and adding them, we get $59. So where is the remaining $1?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

When can we add 2 to 11 and get 1 as the correct answer?

John bought 150 chocolates but he misplaced some of them. His Father asked him how many chocolates were misplaced.
He gave the following answer to him:
If you count in pairs, one remains
If you count in threes, two remain
If you count in fours, three remain
If you count in fives, four remain
If you count in sixes, five remain
If you count in sevens, no chocolate remains.

Can you analyze the statements and tell us how many chocolates were lost?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?