What does below pictogram mean?

How can one talk without saying a single word?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

Teacher ask the student

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

what did student replied ?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

Do you know who was buried in John's tomb?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

You knock a Table over in the library, and suddenly 20 eyes are looking at you.