Four Fours

Beremiz shows how to make each of the numbers from zero to ten by combining exactly four 4s.

The Man Who Counted by Malba Tahan: Ch.7: Going to Market

Brazil 4 maths – The Definitive Four Fours Answer Key

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).

GEOMAGIC SQUARES

SAM LOYD’S PUZZLES FOR KIDS

Sam Loyd’s Billboard Puzzle

Quarrelsome Neighbors

Sam Loyd’s Train Puzzle

Mathematical Valentine

Season’s Greetings Puzzle

Do you have a favorite postcard?

If it’s too hard to choose, a blank rectangular sheet of paper will work even better.

With a pair of scissors, can you cut a hole, large enough for you to step through it?

The Hole in the Postcard (answer)

Buying Turkeys

A man bought a number of turkeys at a cost of $60.00, and after reserving fifteen of the birds he sold the remainder for $54.00, thus gaining 10¢ a head by these.
How many turkeys did he buy?

536 Puzzles and Curious Problems by Henry Ernest Dudeney

Shopping Spree

Timothy spent all his money in five stores.
In each store, he spent $1 more than half of what he had when he came in.
How much did Timothy have when he entered the first store?

100 Numerical Games by Pierre Berloquin