Rearrange the letters in "new door" to make one word.

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.

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

Rose, Lily and Jasmine decided to buy flowers for their moms on Mother's Day. One of them bought lilies, the other roses, and the third one jasmines.
'It's funny!' said the girl with roses, 'we bought roses, jasmines and lilies, but none of us bought the flowers matching her name'.
'You're right!', said Lily.
What kind of flowers did each of the girls buy?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

What is common among 11, 69, and 88?

How can you make a TV, a bed, a dog, and a car liquid?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?