Sunday, April 3, 2011

Contest #6

Jack, Fred, and Sara have $3000. Fred has a quarter the money that Jack has. Sara has ten times as much money as Fred. How much money does Jack have?

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Solution to Contest #5

A number times the number less four is 320.

Here is the English to math translation:

"a number" becomes = "N"
"times" becomes = "x"
"less four" becomes "-4"
"is" becomes "="
"320" becomes "320"

So the direct translation becomes:

N x (N-4) = 320

When we solve, we get N = 20