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.

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

I have Rs.50 and I spend it in the way as below.

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

What word is represented by this rebus?

The answer I give is yes, but what I mean is no. What was the question?

Two fathers and two sons decided to go to a shop and buy some sweets upon reaching. Each of them bought 1 kg of sweet. All of them returned home after some time and found out that they had 3kg of sweets with them.

They did not eat the sweets in the way, nor threw or lose anything. Then, how can this be possible?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.