Posts filed under ‘.puzzle’
This is a great 19th century variation on river crossing puzzles.
A Preacher, Deacon and Janitor have to get home from Church with their wives. The only umbrella is only large enough for two.
April and Bernard just met Cheryl. “When’s your birthday?” April asked Cheryl.
Cheryl thought a second and said, “I’m not going to tell you, but I’ll give you some clues.” She wrote down a list of 10 dates:
May 15 — May 16 — May 19
June 17 — June 18
July 14 — July 16
August 14 — August 15 — August 17
“My birthday is one of these,” she said.
Then Cheryl whispered in April’s ear the month — and only the month — of her birthday. To Bernard, she whispered the day, and only the day.
“Can you figure it out now?” she asked April.
April: I don’t know when your birthday is, but I know Bernard doesn’t know, either.
Bernard: I didn’t know originally, but now I do.
April: Well, now I know, too!
When is Cheryl’s birthday?
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Beremiz shows how to make each of the numbers from zero to ten by combining exactly four 4s.
Four fours is a mathematical puzzle. The goal of four fours is to find the simplest mathematical expression for every whole number from 0 to some maximum, using only common mathematical symbols and the digit four (no other digit is allowed).