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Brain Teaser – June 15

Medical News Bulletin
By Medical News Bulletin
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Dr. Johnson is trying to solve a puzzle from an intelligence test. Can you help him?

5+3=28

7+2=59

6+4=210

8+5=313

9+8=117

??+??=222

See the answer

Answer:

The pattern is A+B=(A-B)(A+B), so from the last sentence we have A-B=2 and A+B=22.

Therefore, A=12 and B=10, so the last sentence is 12+10=222.

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