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.

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

What word begins and ends with an E, but has only one letter?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?