Balancing Problem - Part 3

Algebra Level 1

In the above diagram, both beams are balanced.

How many squares will it take to balance 1 hexagon and 2 triangles?

2 squares 4 squares 3 squares 6 squares

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3 solutions

Sravanth C.
Apr 25, 2015

Let us represent triangle as t, square as s, and hexagon as h.

Therefore, 4 t = 3 s 4t=3s

Or, 2 t = 3 s 2 \displaystyle 2t=\frac{3s}{2}

And, 2 h = 3 s 2h=3s

Or, h = 3 s 2 \displaystyle h=\frac{3s}{2}

Therefore the no. of squares they will balance one hexagon and two triangles is given by,

3 s + 3 s 2 \frac{3s+3s}{2}

Or, 6 \boxed{6}

Moderator note:

A slightly shorter solution: 3 s = 4 t = 2 h 3s = 4t = 2h , then 4 t + 2 h = 6 s 4t + 2h = 6s or 2 t + h = 3 s 2t + h = 3s .

BTW, this question is awesome!

Sravanth C. - 6 years, 1 month ago

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Thanks! I had fun creating these problems, and I'm glad that you enjoyed solving them. It's actually linear equations in disguise, and much more fun to work with.

Chung Kevin - 6 years, 1 month ago

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Cool questions dude.

Naveen Kumar - 6 years, 1 month ago

@Calvin Lin sir, assuming that you're the challenge master, should I change my solution as notified???

Sravanth C. - 6 years, 1 month ago

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No worries. There are multiple approaches to this problem. I was pointing out another way where we could solve it directly, without having to figure out the individual weights.

Calvin Lin Staff - 6 years, 1 month ago

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Thank you sir!

Sravanth C. - 6 years, 1 month ago
Vinayak Patil
Apr 26, 2015

If T-Traingles S -circles and h-Hexagon 4T=3S=2H dividing by 2 it gives 2T=3/2 S=1H 1H+2T= 3/2S+3/2S = 3S

Zi yang Lim
Apr 28, 2015

Triangle = T Square = S Hexagon = H

4t = 3s 2t = "1.5" 2h = 3s h = "1.5"

"1.5"+"1.5"= 3

Therefore 3 squares would balance 1 hexagon and 2 triangles

What do you mean by 2t = "1.5" and h = "1.5"?

Chung Kevin - 6 years, 1 month ago

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