### Brain Teasers

# Variables Vary

If the answer to the equation

a + 1 = 3 is a = 2, then what is the answer to the following equation?

X x X = C

X=

C=

a + 1 = 3 is a = 2, then what is the answer to the following equation?

X x X = C

X=

C=

### Answer

X=10C=100

The letters aren't variables, they're roman numerals.

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## Comments

Sneaky! Very, very sneaky - but cute, I guess - my reaction varies!

Easy but fun.

I thought it was difficult.

that was a very wierd teaser. It made me think of school again...Cool!

I guess the answer can vary. X could equal 2. 2 x 2 = 4. So C can equal 4. But I like your thinking.

cool!

An alternate solution is:

X=square root of c

C=x squared

X=square root of c

C=x squared

Math is not my strongest point so I gave up and looked at the answer. Talk about feeling really, really stupid!!!! So simple that I made it difficult. Good job.

There was no way to think it would represent Roman Numerals, so I just thought ... 'they have nothing to do w/ the equation so there isn't enough info'

I was wrong

I was wrong

ohhhh the little x is a multiplication symbol! haha i totally knew that! (not) i liked it (but i mean...look at my name)lol

i had the same answer as joediggity - i liked the roman numerals thing though

The definetly tricked me!

not the hardest teaser ever, but still not a bad one.

Mario-you made two mistakes

I'll let you figure out the first one.

Mario-you made two mistakes

I'll let you figure out the first one.

Cool teaser. This one got me!

Doh!

it's ok froggygg math is n my best subject

it's ok froggygg math is not my best subject

I stink a math so I didn't even try!

nice one it was pretty tough. i like a good challenge

drats.... I don't really know Roman Numerals so I didn't think about it

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