Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

what does the below rebus means?

John was piloting a plane behind a car but was never able to overtake it. Why?

Which Travels Faster? Solve below famous picture riddle:

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

What is the centre of gravity?

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

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?