3 years ago

1+4=5 2+5=12 3+6=21 8+11=

1 answer:

8 0

1+4=5 2+5=12 3+6=21 8+11=40

Explanation: 1+4=5; 2+5=7+5(the previous result)=12; 3+6=9+12=21;
8+11=19+21=40.

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