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12 questions from this quiz
Assume the opposite of what you want to prove
'A contradiction'
Not all numbers are even
The integer k+1k + 1k+1
n2n^2n2 is odd and nnn is even
2(2a2)2(2a^2)2(2a2) which is even
2(4m3+6m2+3m)+12(4m^3 + 6m^2 + 3m) + 12(4m3+6m2+3m)+1
No common factors
aaa and bbb have no common factors
Because a2a^2a2 is even
They share a common factor of 2
At least one multiple of 2 is not a multiple of 3
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