# If 2 3 = 9; 5 4 = 26; and 6 2 = 13 then 7 4 = ??

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If

``````2    3 = 9
5    4 = 26
6    2 = 13
``````

Then

``````7    4 = ??
``````
posted Aug 2, 2016
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## 2 Answers

0 votes

Answer is 15.

Solution:

2x3 = 6+3 = 9

5x4 = 20+6 = 26

6-2 = 4+9 = 13

7-4 = 3+12 = 15

answer Aug 3, 2016
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If we give values of x=0,1,2 corresponding to y=9,26,13 the series follows the curve y=9+32x-15x^2. In that case for the next value of x=3, y comes =30

answer Jan 3, 2017

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