Dear Dayre

I just finished moving my bunk for the 2nd time this week. Hopefully it is the last time I moved my bunk as it is the 3rd time I moved since I came to this base. A few cuts here and there due to the edges of lockers but nevertheless, I feel satisfied after seeing my new bunk neat and tidy. 😳

Going to hop into the shower room for a bath and get ready to go home!

Anyway, a poly friend of mine recently sent me this question to solve and I can't believe I took 23mins. 😱

Last night, I decided to let my other comrades tried out. Most of them took a long time while some couldn't solved it. Only two managed to solve it in 10mins. I guess it is true that after serving in the National Service for nearly 2 years, IQ does drops.

For those who would like to try it out, this is the question:

The solution that I worked out for this question is right below.

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Let the top left box be 'a', bottom left box be 'b', top right box be 'c', bottom left box be 'a'.
Why is bottom left box 'a' as well?

Firstly, when you did the trial and error method, you would have noticed that whatever whole number you have inputted, it is still incorrect. However, you would have noticed that the number you inputted on the top left box have to be the same as the bottom left box to get 8. Since both boxes are the same, the bottom left box is also 'a'.

Next, you create equations.

a+b=13
b-a=6
b=6+a

sub b=6+a into a+b=13

a+6+a=13
2a=7
a=7/2

sub a=7/2 into b=6+a

b=6+7/2=9 1/2

sub a=7/2 into a+c=8

7/2 + c = 8
c=9/2

Tadah! This is my solution to the question above. 😁

#dayremath

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