Maths Question

[ebilcake]

Sent to me this morning by a friend who happens to be a maths teacher.

Enjoy.

 

[Freakbro]

£180?


Edit : nope

 

[Tuppy_Glossop]

£120

 

[MrWhippy]

£360

 

[skaif]

£360?

 

[Tuppy_Glossop]

15 + x/2 + (1/4 * 1/2)x + (2/3 * 3/8)x = x
x - 4x/8 - x/8 - 2x/8 = 15
x/8 = 15

 

[Antar Bolaeisk]

£120

Initial: 120

Spent on holidays: 60 (1/2)
Spent on clothes: 15 (1/4 of 60)
Spent on presents: 30 (2/3 of 45)
Remainder: 15

 

[Mr Jack]

£120

 

[Threepwood]

15x3x4x2

?

 

[CrispyOtter]

Initial: 120

Spent on holidays: 60
Spent on clothes: 15
Spent on presents: 30
Remainder: 15

+1

 

[estebanrey]

£120

Holiday = £60
Clothes = £15
Presents = £30

 

[bluebeatle]

Yep £120

 

[ebilcake]

£120

Correct, well done Sir.

 

[estebanrey]

By the way if anyone wants to know the formula for this (bet most people did it by trial and error) it is thus.....

15/(1-((1/2)+((1/2)/4)+(((1-((1/2)+(1/2)/4))/3)*2)))=120

 

[ukxenon]

ouch my head i am getting too old for this

 

[eatcustard]

has he paid his tax on the savings?

 

[glenimp617]

BODMAS

 

[faheemrazzaq]

120

 

[Judgeneo]

Josh spent 1/2
Josh spent 1/4
Josh spent 2/3
Josh has £15

£15 / (1 - 2/3) = £15 * 3
£45 / (1 - 1/4) = £30 * 4/3
£60 / (1 - 1/2) = £60 * 2


The most confusing parts about this sort of question is always the english, the maths itself is trivial, even for the kids.

 

[Tephnos]

Josh spent 1/2
Josh spent 1/4
Josh spent 2/3
Josh has £15

£15 / (1 - 2/3) = £15 * 3
£45 / (1 - 1/4) = £30 * 4/3
£60 / (1 - 1/2) = £60 * 2


The most confusing parts about this sort of question is always the english, the maths itself is trivial, even for the kids.

Yeah, the 'wordy' questions are always the ballache part.