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Algebra Math Riddles Collection
A collection of Algebra Math Riddles for fun and pleasure! Tease your brain with these riddles,
then click to show or hide the answer.
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Also visit our Math Trivia page for more arithmetic riddles, geometry riddles, statistics riddles, calculus riddles etc.
Algebra
- Why didn’t the Romans find algebra challenging?
Because X was always 10.
- How do we know that the following fractions are in Europe? A/C, X/C and W/C ?
Because their numerators are all over C's.
- What do you get when you combine Einstein and Pytahgoras discoveries?
E m c2 = m ( a2 + b2 )
- How do you expand (a + b)2?
(a + b) 2
- How would you prove that 2 = 1?
If a = b (so I say) [a = b]
And we multiply both sides by a
Then we'll see that a2 [a2 = ab]
When with ab compared
Are the same. Remove b2. OK? [a2− b2 = ab − b2]
Both sides we will factorize. See?
Now each side contains a − b. [(a+b)(a − b) = b(a − b)]
We'll divide through by a
Minus b and olé
a + b = b. Oh whoopee! [a + b = b]
But since I said a = b
b + b = b you'll agree? [b + b = b]
So if b = 1
Then this sum I have done [1 + 1 = 1]
Proves that 2 = 1. Q.E.D.
Written by PeterW
(Just in case you're wondering - the above proof is incorrect because in step 5, we divided by (a - b) which is 0 since a = b)
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