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If 1+4=5, 2+5=12, and 3+6=21 then what is 8+11?

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If 1+4=5, 2+5=12, and 3+6=21 then what is 8+11?
posted Apr 25, 2017 by anonymous

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4 Answers

+3 votes
 
Best answer

As 1+4=5 i.e.(1*4+1)
2+5=12 i.e(2*5+2)
3+6=21 i.e(3*6+3)
So 8+11=96 as (8*11+8)=96.

answer Apr 25, 2017 by Pratyush Pathak
0 votes

You have to add the numbers from the previous problems to get the answer
1+4=5
2+5=12 (1+4+2+5=12)
3+6=21 (1+4+2+5+3+6=21)
8+11=? (1+4+2+5+3+6+8+11=40)

40 is the answer

answer Apr 25, 2017 by Brooke German
unless you say its 1+4+2+5+3+6+4+7+5+8+6+9+7+10+8+11

Which in reduction comes back to x + y =x*y + x

Which at last gives the same answer....96
0 votes

1×4+1=5, 2×5+2=12, 3×6+3=21,
Then 8×11+8=96
96 answer
How it's done. ....
We multiple first digit to second digits and add first digit

answer Apr 26, 2017 by anonymous
0 votes

96
1*4+1=5
2*5+2=12
3*6+3=21
8*11+8=96

answer Jun 22 by Imre Fesis
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