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A comment on Many elementary teachers don’t understand math, and it makes them anxious. Parent comment

Re:Many elementary teachers don’t understand math, and it ma... by d0mine on Sunday December 01, 2019 @02:42AM (#21674379)
Given 11 numbers: n, n+1,...,n+10 the sum of 10 of them:

    10*n+sum_conseq=2012
where max(sum_conseq)=0+1+...+10=(0+10)+(1+9)+(2+8)..=55

therefore erased number is n+3 because (2012-55-3) divisible by 10 -> n=196.

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