What is the answer to 1+5=12;2+10=24; 3+15=36 then 5+25=?

This is a brain teaser and I thought I had the answer at 60 but everyone is answering that and that makes me suspect..
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2 Answers

60 - multiply the first number by 7
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30 The rest of the answers in the puzzle are wrong and misleading.
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