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# Which continent

A total of 15 delegates from Africa, Asia, America, and Europe meet at an international conference.
Each continent sends a different number of delegates, and each is represented by at least 1 delegate.
America and Asia send a total of 6 delegates.
Asia and Europe send a total of 7 delegates.
Which continent has sent 4 delegates?

How many delegates are from Asia? Since they make a total of 6 with those from America which has sent at least 1, they can be 1, 2, 3, 4, or 5. 3 is impossible since it would yield an equal number of delegates from America. 1 would yield 5 from America, 6 from Europe, and hence 3 from Africa. This is impossible, for one continent has sent 4 delegates. 2 would yield 4 from America, 5 from Europe, and 4 from Africa, which is impossible, for America and Africa would have sent the same number.

## How can this be?

A certain large animal lives happily and thrives here on Earth. One day, every single one of these critters is wiped out by a mysterious disease which affects only this particular animal. There are none left anywhere on earth -- they are all gone. About a year or so...

## How old is Mike?

David and Mike are brothers. David is 33 years old today. This is three times as old as Mike was when David was the age that Mike is today.How old is Mike?Mike is 22 years old.more riddlesDonec rutrum congue leo eget...