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Mathematics 9 Online
OpenStudy (anonymous):

Pierre de Fermat, a 17th century French lawyer, stated that any whole number can be written as the sum of four or less square numbers. For Example . 15 = 3(squared) + 2(squared) + 1(squared) + 1(squared)

OpenStudy (anonymous):

It's a nice theorem, but what is the question?

OpenStudy (anonymous):

oh sorry u have to make 95

OpenStudy (anonymous):

Make 95 out of sums of squares?

OpenStudy (anonymous):

yeah :)

OpenStudy (anonymous):

Ok, so what the largest perfect square less than 95?

OpenStudy (anonymous):

what's*

OpenStudy (anonymous):

ummmmmmmmmmm...

OpenStudy (anonymous):

10^2 is 100. What's 9^2?

OpenStudy (anonymous):

81

OpenStudy (anonymous):

Then the largest perfect square that won't add up to over 95?

OpenStudy (anonymous):

I like that theorem

OpenStudy (anonymous):

so 9^2 + 4^2 + 1^2 is the answer?

OpenStudy (anonymous):

Close. 4^2 is 16. 81+16+1 is 98. So you have to use 3^2.

OpenStudy (anonymous):

now im lost :/

OpenStudy (anonymous):

Ok, 9^2 is 81, right? You can't use 4^2 since 81+16 is greater than 95. So 81+3^2 is 90. Now you have 5 left. How can you make 5 out of sums of squares?

OpenStudy (anonymous):

2^2 and 1^2

OpenStudy (anonymous):

So your answer is 9^2+3^2+2^2+1^2.

OpenStudy (anonymous):

oh thank you mate :)

OpenStudy (anonymous):

Such a fun theorem.

OpenStudy (anonymous):

haha :)

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