help explain

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adhdad
Posts: 167
Joined: Sun Aug 11, 2013 8:59 pm

help explain

Post by adhdad »

could someone help me explain how you get the the answer to the following question in a way that ds can use it again.

A - B = 48

A + B = 120


ANSWR IS 84 AND 36.

thankyou all
Guest55
Posts: 16254
Joined: Mon Feb 12, 2007 2:21 pm

Re: help explain

Post by Guest55 »

Is this a real 11+ question?

Have a think about what happens when you add the two equations ...
adhdad
Posts: 167
Joined: Sun Aug 11, 2013 8:59 pm

Re: help explain

Post by adhdad »

The question was given to me as one of many by a very expeienced tutor.
Guest55
Posts: 16254
Joined: Mon Feb 12, 2007 2:21 pm

Re: help explain

Post by Guest55 »

I seriously doubt it would appear in an 11+ in that format ...

It might br possible to get something like:

Jane buys a cup of coffee and a cup cake for £1.75.

Iqbal buys two coffees and a cup cake for £3.

How much is a cup cake?
ConcernedDad
Posts: 204
Joined: Wed Jan 25, 2012 8:43 pm

Re: help explain

Post by ConcernedDad »

adhdad wrote:could someone help me explain how you get the the answer to the following question in a way that ds can use it again.

A - B = 48

A + B = 120


ANSWR IS 84 AND 36.

thankyou all

Agree with Guest55. Question is not likely to appear in 11+ in this format.

It is more likely to be in the form of

Samantha is 48 years younger than her grandmother. Their combined age is 120 years. How old is Samantha?
adhdad
Posts: 167
Joined: Sun Aug 11, 2013 8:59 pm

Re: help explain

Post by adhdad »

Yes your both rite, the question style was given to me by the tutor to then explain to ds so that he could apply it to other question styles. We didnt expect the question to come in this format only for us to use the same principal in trying to answer the question. Hope that makes sense. But if some1 could explain how to get the answer in very simple terms that would be useful as i'm poor at maths. thanks all
Guest55
Posts: 16254
Joined: Mon Feb 12, 2007 2:21 pm

Re: help explain

Post by Guest55 »

Algera isn't intended for these questions - look at my example:
Jane buys a cup of coffee and a cup cake for £1.75.

Iqbal buys two coffees and a cup cake for £3.

How much is a cup cake?
Iqbal buys one more coffee - how much extra is his bill? That must be the cost of a coffee.
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