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If 1-3+4=100, 4-6+9=999, 2-6+7=879 then 3-3+6=?

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posted Sep 7, 2014 by anonymous

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2 Answers

+1 vote
 
Best answer

1•a-3•b+4•c=100 (1)
4•a-6•b+9•c=999 (2)
2•a-6•b+7•c=879 (3)

(1)x3, get
2•a-6•b+8•c=200 (4)

(4)-(3), get
c=-679

(2)-(3), get
2•a+2•c=120
a=[120-2•(-679)]/2=739

substitute value a & c to (1), get
-3•b=100-1•(739)-4•(-679)=2077

3•a-3•b+6•c
=3•(739)+2077+6•(-679)
=220

3-3+6=220

answer Sep 8, 2014 by Naveen Kumar
0 votes

answer is 220

answer Sep 7, 2014 by Sanchit Jain
What is the logic????
Check Naveen's solution



Similar Puzzles
0 votes

If
1-3+4=100,
4-6+9=999,
2-6+7=879
then
3-3+6=???

0 votes

If
5 + 4 => 9
3 + 5 => 9
9 + 1 => 9
1 + 6 => 8
4 + 2 => 8
1 + 7 => 7
5 + 6 => 6
3 + 7 => 3
7 + 0 => 0
Then
8 – 1 => ??

0 votes
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