Pattern?

If statements below are true, then find the value if the ?

11 X 11 = 4
22 X 22 = 16
33 X 33 = ?
36 18 Not enough information given 108

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1 solution

Matthew Schaefer
Sep 27, 2018

There is simply not enough information given here to conclude one answer.

18 is a popular answer given since 11X11=121=(1+2+1)=4, and 22X22=484=(4+8+4)=16, thus 33X33=1089=(1+0+8+9)=18

36 is also popular, multiple ways to show this, most common is 11X11=(1+1)(1+1)=4, 22X22=(2+2)(2+2)=16, thus 33X33=(3+3)(3+3)=36

64 is not as common, but can be shown by 11X11=2^(1+1)=4, 22X22=2^(2+2)=16, 33X33=2^(3+3)=64

Recently a student of mine showed 36 as answer in another way, he divided each answer by 30 and rounded, i.e. 11X11=121/30=4 (rounded), 22X22=484/30=16 (rounded), thus 33X33=1089/30=36 (rounded)

To date I have twelve justifiable solutions to this problem! All from HS students, so I am curious how many more this community will think of!!!

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