Off topic but.........Maths homework

Submitted: Sunday, Feb 06, 2005 at 23:34
ThreadID: 20194 Views:1683 Replies:6 FollowUps:10
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Bloody homework

Question "Make a target number of 37 by using 5 fives.

There are two ways to do it and you can use any maths operation that you wish but it must only use 5 fives. It must use all 5 of them."

I assume that means 5.5 x 5 or 5 squared and the root square of 5 and that sort of thing as well as the normalo plus and minus and divide etc.

My gratitude and sanity to whoever gets me the answer.

Regards
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Reply By: Member - Smocky (NSW) - Monday, Feb 07, 2005 at 00:00

Monday, Feb 07, 2005 at 00:00
How about:

(5.5 X 5) + (2 x 5) - 0.5 =

May be long winded and I only just through it up off the top off my head.

Cheers,

Smocky.
AnswerID: 97022

Follow Up By: Moneypit - Monday, Feb 07, 2005 at 00:05

Monday, Feb 07, 2005 at 00:05
Smocky,

Looking good till that 2 popped its head up. Only allowed to use 5's.

Thanks anyway

Dave
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FollowupID: 355634

Follow Up By: Member - Crazie (VIC) - Monday, Feb 07, 2005 at 08:53

Monday, Feb 07, 2005 at 08:53
Just change Smocky's to
(5.5x5)+(5+5)-0.5 =
0
FollowupID: 355648

Follow Up By: GaryInOz (Vic) - Monday, Feb 07, 2005 at 12:53

Monday, Feb 07, 2005 at 12:53
one, two, three; four, five; six. Dohhh!!!!
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Reply By: Member - Melissa - Monday, Feb 07, 2005 at 00:30

Monday, Feb 07, 2005 at 00:30
((5+5)/5)to the 5th power + 5

= (10/5)to the 5th power +5
= 2 to the 5th power + 5
= 32 + 5
= 37

:o) Melissa

AnswerID: 97025

Follow Up By: Moneypit - Monday, Feb 07, 2005 at 01:22

Monday, Feb 07, 2005 at 01:22
Aahhh Melissa,

At least your kids will be able to bring home maths homework with some confidence. I wish my old man had the net when I was a kid. My daughter is grateful to you and one other forumite from else where who both got it right.

But there are supposed to be 2 ways and I got this same answer on both so........

Hey thanks again.

Dave and the daughter
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Follow Up By: Member - Melissa - Monday, Feb 07, 2005 at 01:30

Monday, Feb 07, 2005 at 01:30
Happy to have been of assistance Dave and daughter!

:o) Melissa
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Follow Up By: Member - 'Lucy' - Monday, Feb 07, 2005 at 08:26

Monday, Feb 07, 2005 at 08:26
Sensational

I have copied and pasted this little gem into my 'how to' book so that next time (hope never) when I am up S H I T creek in the middle of nowhere I am going to call upon this elucidation of mental genius To:

(1) Take my mind off the situation at hand

(2) Pass the time (if necessary) awaiting assistance

(3) Help me reflect upon what I have 'missed' in life

(4) Give me the inspiration/incentive to think laterally so I can solve the problem at hand and not have to consider this piece of mental torture.

I have to admit though, after tooling down to the Powlett River mouth on Bass Strait (between Wonthaggi and Phillip Island) yesterday in the new JEEP KJ Diesel, and then walking along the beach with the dog and SWMBO with only one other person and two dogs in sight; I thought how good is this and in approx 30months I'll be doing this type of thing full time with no thoughts what so ever of the aforementioned problem.

However I must ask the question though:

Where and how many times other than in a school text book would a situation arise requiring the above formula to solve it.

Also, what type of situation would it be.
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Follow Up By: GaryInOz (Vic) - Monday, Feb 07, 2005 at 12:55

Monday, Feb 07, 2005 at 12:55
Melissa, your MENSA application is in the mail.........well done!
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Reply By: old-plodder - Monday, Feb 07, 2005 at 09:12

Monday, Feb 07, 2005 at 09:12
Ah, you might be a old codger with a modernistic attitude to education.
(tranlation - you learn by rote)
However, in this postmodernistic age of educational demogogy, it is the process that is important.
(translation - kids go through exercises to understand the process, knowledge is freely available and changing and therefore has no value in itself.)

Being an old bloke I had to learn this by rote to survive, since I have 4 teachers around me talking all sorts of educational theory.
AnswerID: 97053

Follow Up By: Member - Davoe (WA) - Monday, Feb 07, 2005 at 10:47

Monday, Feb 07, 2005 at 10:47
I like the saying that knowlege is knowing where to find the answer
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Follow Up By: GaryInOz (Vic) - Monday, Feb 07, 2005 at 12:57

Monday, Feb 07, 2005 at 12:57
...and intelligence is the ability to use familiar processes in an unfamiliar situation.
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Reply By: Gajm (VIC) - Monday, Feb 07, 2005 at 15:20

Monday, Feb 07, 2005 at 15:20
You people are making my head hurt!...I will stick with the basics...fire, hot!
AnswerID: 97102

Follow Up By: Member - Brian (Gold Coast) - Monday, Feb 07, 2005 at 19:39

Monday, Feb 07, 2005 at 19:39
"You people are making my head hurt!...I will stick with the basics...fire, hot!"

LOL..... very good Gajm.... today I had a similar "basic".... hammer.. thumb....ouch!!!!!!!!!!!!!
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FollowupID: 355752

Reply By: David Bell - Tuesday, Feb 08, 2005 at 12:25

Tuesday, Feb 08, 2005 at 12:25
(5*.01184*5*5*5*5) is the only solutionthat uses 5 fives.
Cheers. hope this helps.
AnswerID: 97226

Reply By: Frank_Troopy - Tuesday, Feb 08, 2005 at 23:43

Tuesday, Feb 08, 2005 at 23:43
(5!/(5+5))+(5*5)

5! is 5 factorial or 5 * 4 * 3 * 2 = 120

the above is therefore 120 / 10 + 25 = 37

Cheers Frank.
AnswerID: 97366

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