What happened when the wheel was invented?

why number 8549176320 is one of a kind?

Find the 8 in the below-given Image.

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

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.

What does this rebus means ?

A man dies of old age on his 25 birthday. How is this possible?

Which is faster, Heat or Cold ? Explain.

Find the next number in the series.
1 10 24 43 67 ?

You walk into a room and see a bed. On the bed, there are two dogs, five cats, a giraffe, six cows, and a goose. There are also three doves flying above the bed. How many legs are on the floor?