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If 2,6=5; 4,9=7; 6,11=8 and 8,15=11 then 12,18=?

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If
2,6=5
4,9=7
6,11=8
8,15=11
then
12,18=?

posted Apr 22, 2017 by Suhaib Al Asi

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2 Answers

+1 vote

18 - half of 12 =12 so 12 is the answer

answer Apr 23, 2017 by Kewal Panesar
if 2 × 8 = (_) × (_) then (_) = (_)
how about 15?
2+6-3=5
4+9-6=7
6+11-9=8
8+15-12=11
12+18-15=15
+1 vote

Answer = 12
a,b = b - a/2
2,6=5 -> 6 - 2/2 = 5
4,9=7 -> 9 - 4/2 = 7
6,11=8 -> 11 - 6/2 = 8
8,15=11 -> 15 - 8/2 = 11
then
12,18= -> 18 - 12/2 = 12

answer Apr 23, 2017 by anonymous
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