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Maths Teaser Adults can't do.


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This is a sum for primary school children which millions of Adults couldn't get right. Can you?

 

You have 3 parcels

Parcels A and B together weigh the same as parcel C

The three parcels weigh 800gms altogether

Parcel A weighs 250gms

How much does parcel C weigh?

 

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so C is half the weight of the total of 800 = 400

why do we need the weight of A? or am I missing something?

 

This si the sort of problem displayed at my lad's secondary school, so i don't know why they say its for primary school. Primary school for Oxbridge potentials perhaps? Might have been more sensionalist if they said it was for mums & baby's classes

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A+B+C=800

A+B=C

 

so C+C=800

C=400

 

Why do we need to know how much A weighs?

 

You don't in my day :o you wouldn't have it would have been.....

 

You have 3 parcels

Parcels A and B together weigh the same as parcel C

The three parcels weigh 800gms altogether

 

How much does parcel C weigh?

 

 

even then we would have p'd ourselves at how easy that was:hihi:

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A+B+C=800

A+B=C

 

so C+C=800

C=400

 

Why do we need to know how much A weighs?

 

So that you can waste your doing doing it the long way like I did. D'oh.

 

jb

Indeed. Or maybe the problem with these so-called "elementary maths problems that adults can't do" is that the question is badly written that it confuses people?
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Indeed. Or maybe the problem with these so-called "elementary maths problems that adults can't do" is that the question is badly written that it confuses people?

 

I agree, the weight of parcel A clouded things a little for me. It's a meaningless fact in the equation, but I started to wonder if parcels A and B are the same size and weight.

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