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Curated Video
Solve If You Are A Genius (From 1869). Harvard Admissions Question Algebra Problem
The Harvard admissions exam in 1869 included this algebra problem: "A man bought a watch, a chain, and a locket for $216. The watch and locket together cost three times as much as the chain, and the chain and locket together cost half as...
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Multiply Numbers And Algebra Equations By Drawing Lines
Some people say this is "how the Japanese multiply." Others say this is "Vedic Math." I'm not sure of the origin, but this is a visual way to multiply two numbers and it does work. The video also shows how to use the same method to...
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Impossible Algebra Problem
This problem is making the rounds. Can you place numbers in the four boxes so all the equations are true? Blog post (text/image explanation) If you like my videos, you...
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Can You Solve The Lying Fishermen Riddle? A Fantastic Algebra Puzzle
Thanks to Halvor Kjærås for creating this logic puzzle! Barney says he caught 5 fish, and Alfred says he caught 2. But each person fibs about numbers when spoken aloud. Can you figure out how many each person actually caught? My blog...
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Can You Solve The Cat, Fish, And Bird Riddle? This Algebra Problem Tricks Many
A child spent $100.00 to get 100 toy animals. The child bought at least one cat, one fish, and one bird, and did not buy any other toys. If a cat costs $10.00, a fish costs $3.00, and a bird costs $0.50, how many of each toy did the...
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Homework In China Stumps Adults - The Flower Algebra Problem
This emoji math problem is said to come from a test given to a Chinese kindergarten class (5 year olds). It was posted online and caused a lot of debate as adults were stumped about the correct answer, some saying it is impossible. Can...
