1
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If,

7∆ + 11□ - 2□ + 1∆ = 36

12∆ - 8∆ + 8□ + 2∆ = 25

3□ + 17∆ + 5□ + 2∆= 289

then,

1□ + 7□ + 2□ + 3∆ + 17∆ = ?

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4
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1

because

triangle means multiplying by 3, square means multiplying by 4. The answer is the sum of the digits of the result squared.

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1
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This is pretty far fetched but:

Is it... 324 because you add all the numbers in the line before the equal sign and you take away the sum of the squares +2 (and +1 if the numbers contains non-primes) and then square the result?

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2
  • $\begingroup$ I would laugh if this was right $\endgroup$ Dec 8 '19 at 12:57
  • $\begingroup$ Not the correct answer.. I can say, the logic is much more simpler $\endgroup$ Dec 8 '19 at 13:20

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