Math quiz; Who is right?

tomdav

Well-Known Member
Actuary says 120. Division takes precedence in the equation order. You can enter it in a spreadsheet to verify. :)
 

PaD

Well-Known Member
120
I was taught that there is an order of operations and I thought that was still the rule.
Strange answer from a math PhD. Age?
Why not use parentheses? That’s an easy way to show how the problem is meant to be solved.
 

Oberst

Active Member
120
I was taught that there is an order of operations and I thought that was still the rule.
Strange answer from a math PhD. Age?
Why not use parentheses? That’s an easy way to show how the problem is meant to be solved.
I was thinking the same thing about parentheses.
 

harryS

Well-Known Member
I was born in the 1940's and learned my math scratching a rock on a coal shovel. I get 110.

Take 79 bicycle helmets and add 40 more. That's 119. Now subtract your age. If the answer was the last two digits of the year you were born, you deserve to own an ebike for your birthday. If it wasn't then you already had your birthday. Did you get an ebike?
 

Martinet

Member
I was born in the 1940's and learned my math scratching a rock on a coal shovel. I get 110.

Take 79 bicycle helmets and add 40 more. That's 119. Now subtract your age. If the answer was the last two digits of the year you were born, you deserve to own an ebike for your birthday. If it wasn't then you already had your birthday. Did you get an ebike?
Weather is a little cold here, so I'll stick to high-low poker for now. [hint]
 
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Over50

Well-Known Member
Who is right?

230 - 220 ÷ 2 =

I say it is 120

A math PhD says it is 5!
Both could be correct (dependent on the calculator)? Of course a human using math or most calculators will respect the order of operations (just put it in Excel as you wrote it and the answer is 120....Python too). But I think there are some programming languages out there that operate simply on a left to right basis. In which case the answer is 5.

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Martinet

Member
Given the "normal" order of calculations, they were BOTH right.


120 = 5!

My apologies to anyone who is unfamiliar with factorials.