If 21x = 79x, what is the value of x?

Teacher ask the student

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

what did student replied ?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

Can you find a five letter word that is left with only two letters if one is removed?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Find the number of squares in the below-given picture.

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

What is always in front of you but can’t be seen?