Math Is Fun Forum

jmoore

Member

Registered: 2008-01-09

Posts: 25

Maths in my Police Test

Hello everyone,

sorry to be a pain but i need some help on working out the following questions that are in my Police Test and i am not very good at maths

question 1

"How many 568ml cartons of milk are there in a chiller unit if the total quantity of milk being stored is 17. 040 litres?"

Question 2

"if 3m of chain-fencing are needed to link up two posts, what is the total lenght required to link up 10 posts? (my answer was 30 but i was wrong)

Question 3

"a car park is full and contains a 150 cars. if 40 cars are blue, 30 are white and 30 are green and the rest are red, what percentage must be red"

thanks for your time i would be happy if someone would show me how to work these questions out please note this is only a practice test and not my real police test

thanks

Joe

rlwjr

Member

Registered: 2008-01-08

Posts: 8

Re: Maths in my Police Test

#1...  I think I'm sure, but not positive so I won't answer.

#2.  Think gaps your filling, not total posts.

#3.  Figure out how many are red and divide that number by the total.  Move your decimal two placed to the right and that's your percent.

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: Maths in my Police Test

Question 2 is a trick question.

Anyway, the other two are straightforward.

Last edited by JaneFairfax (2008-01-09 10:43:15)

jmoore

Member

Registered: 2008-01-09

Posts: 25

Re: Maths in my Police Test

for number 3 i got this 150/50 goes 3 times so am i correct in saying it is 30%

jmoore

Member

Registered: 2008-01-09

Posts: 25

Re: Maths in my Police Test

Question 2 is a trick question.

fair enought lol however when i look at the answers it says 30 as it is multiple choice

rlwjr

Member

Registered: 2008-01-08

Posts: 8

Re: Maths in my Police Test

Not right on the cars problem.  Divide 50 by 150 (50/150).

rlwjr

Member

Registered: 2008-01-08

Posts: 8

Re: Maths in my Police Test

Question 2 is a trick question.

fair enought lol however when i look at the answers it says 30 as it is multiple choice

Is 27 one of the choices?

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: Maths in my Police Test

Question 2 is a trick question.

fair enought lol however when i look at the answers it says 30 as it is multiple choice

It may be one of the choices, but it’s the wrong choice. If you can’t imagine the situation, break it down this way:

You need 3 metres to link 2 posts. ∴ You will need …
6 metres to link 3 posts
9 metres to link 4 posts
12 metres to link 5 posts
15 metres to link 6 posts
…
Continue until you get to 10 posts.

And for the last question, the answer is not 30%. See my edited post above.

Last edited by JaneFairfax (2008-01-09 10:49:50)

jmoore

Member

Registered: 2008-01-09

Posts: 25

Re: Maths in my Police Test

Question 2 is a trick question.

Anyway, the other two are straightforward.

yes but is there a step by step guide? my maths was an E GCSE IN SCHOOL

Identity

Member

Registered: 2007-04-18

Posts: 934

Re: Maths in my Police Test

Contains spoilers

Last edited by Identity (2008-01-09 13:53:49)

jmoore

Member

Registered: 2008-01-09

Posts: 25

Re: Maths in my Police Test

thank you that helped me a lot however could i ask if there is a simple to tutorial on how to do long division as the tutorial on this site confused me a little, thanks

Joe

classicaloa

Member

Registered: 2008-02-26

Posts: 1

Re: Maths in my Police Test

Q1 answer

17040/568
4260/142
2130/71
=30

Q2 answer
3m = 2poles
10poles = 3m / 2 * 10
10poles = 15m

Q3 answer
$150-40-30-30=50$ red cars
What percentage is 50 of 150?
50*100/150=34%

Last edited by classicaloa (2008-02-26 05:12:17)

isaacsma

Guest

Re: Maths in my Police Test

I'm rubbish at Maths too. Got assessment centre 11th June. Go to the shops by a book called All the Math You'll Ever Need: A Self-Teaching Guide
by Steve Slavin. Ive just bought it. It's brilliant and in a few short hours you will be able to multiply, divide and find percentages etc. Don't just buy these books and stick em on the shelf tho. The stuff actually has to be read. Its good tho. x

MathsIsFun

Administrator

Registered: 2005-01-21

Posts: 7,713

Re: Maths in my Police Test

Good advice, isaacsma.

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"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman