Harvey had saved up a number of 2-euro coins. He stored coins in a single layer in a square. Left 6 coins. When he make square, which has one more row, missing 35 coins.

How many euros he have?

Correct answer:

n =  812 Eur

Step-by-step explanation:

n=2x xx+6=(x+1)(x+1)35 6=2x+135 x=20  n=2(2020+6)=812 Eur

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