Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 2017-05-05 13:41:08

Monox D. I-Fly
Member
Registered: 2015-12-02
Posts: 888

[ASK] About Hot and Cold

What is 4 times hotter than -4 degrees Celcius?
A. -16 degrees Celcius
B. -1 degrees Celcius
C. 12 degrees Celcius
D. 16 degrees Celcius

Offline

#2 2017-05-05 16:53:17

thickhead
Member
Registered: 2016-04-16
Posts: 1,086

Re: [ASK] About Hot and Cold

4 times hotter is meaningless.


{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}
(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha
{Gods rejoice at those places where ladies are respected.}

Offline

#3 2017-05-05 20:01:36

Monox D. I-Fly
Member
Registered: 2015-12-02
Posts: 888

Re: [ASK] About Hot and Cold

What?

Offline

#4 2017-05-06 12:03:46

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: [ASK] About Hot and Cold

Hi;

Can you please tell what you get for an answer?


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

#5 2017-05-06 18:54:25

bob bundy
Administrator
Registered: 2010-06-20
Posts: 8,153

Re: [ASK] About Hot and Cold

hi Monox D. I-Fly

I understand why you're puzzled.  That negative makes the question silly.  My son suggests:


(1) Convert to the absolute scale, kelvins, 269
(2)  times by 4, 1076
(3) convert back, 803 degrees celcius.

Ho hum.  Sometimes questions have no answer.

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

Offline

#6 2017-05-07 14:42:36

Monox D. I-Fly
Member
Registered: 2015-12-02
Posts: 888

Re: [ASK] About Hot and Cold

bob bundy wrote:

hi Monox D. I-Fly

I understand why you're puzzled.  That negative makes the question silly.  My son suggests:


(1) Convert to the absolute scale, kelvins, 269
(2)  times by 4, 1076
(3) convert back, 803 degrees celcius.

Ho hum.  Sometimes questions have no answer.

Bob

That's way too hot than all of the options.

Offline

#7 2017-05-07 15:22:11

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: [ASK] About Hot and Cold

Hi;

How about post #4?


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

#8 2017-05-07 18:29:02

bob bundy
Administrator
Registered: 2010-06-20
Posts: 8,153

Re: [ASK] About Hot and Cold

hi Monox D. I-Fly

Yes, that's the puzzle.  Words like 'four times', and 'greater than' and 'negative four' all have well defined mathematical meanings, but 'hotter' doesn't.  Rather it's a colloquial term that doesn't seem to go with the rest of the question.  It's like asking 'Which is bigger, a triangle or a cube?'  In colloquial terms most people would regard -4 degrees C as cold.  You could easily say what is 4 degrees hotter than the given amount; it's the '4x as hot' that messes the question up and I agree with thickhead that it is meaningless as stated.

Where did it come from?

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

Offline

#9 2017-05-08 14:50:41

Monox D. I-Fly
Member
Registered: 2015-12-02
Posts: 888

Re: [ASK] About Hot and Cold

bobbym wrote:

Hi;

How about post #4?

Well, all options are what I got since I was the one who made the question and hoisted by my own petard.
A (-16 degree) was what I got using regular multiplication, but since it's impossible that -16 degree is colder than -4 degree, I made the option D (16 degree).
B (-1 degree) was because I thought -4 degree is four times colder than -1 degree.
C (12 degree) was simply because I added -4 by product of 4 x 4.

Offline

#10 2017-05-08 15:42:18

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: [ASK] About Hot and Cold

Hi;

So you do agree with Bob and thickhead?


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

#11 2017-05-08 15:55:15

Monox D. I-Fly
Member
Registered: 2015-12-02
Posts: 888

Re: [ASK] About Hot and Cold

Yes, I give up.

Offline

Board footer

Powered by FluxBB