Aarrrgh, maths block!
Discussion
Why can't I figure out this seemingly simple problem?:
In a class the ratio of boys to girls is 7:4
There are 9 more boys than girls.
How many children are there in the class?
How the hell do you work this out?
(Feel free to tell me I'm as thick as mince, I'm sure I deserve it on this occasion)
In a class the ratio of boys to girls is 7:4
There are 9 more boys than girls.
How many children are there in the class?
How the hell do you work this out?
(Feel free to tell me I'm as thick as mince, I'm sure I deserve it on this occasion)
Moonhawk said:
Subtract 4 from 7 - gives you 3 difference.
Then divide the 9 overage by the 3 above - also gives you three.
Multiple both 7 and 4 by this second three - gives you:
21 boys and 12 girls - so there are 9 more boys in the class.
21+12 = 33 total
Jesus Christ, why couldn't I see that!?!?!?Then divide the 9 overage by the 3 above - also gives you three.
Multiple both 7 and 4 by this second three - gives you:
21 boys and 12 girls - so there are 9 more boys in the class.
21+12 = 33 total
Moonhawk said:
Subtract 4 from 7 - gives you 3 difference.
Then divide the 9 overage by the 3 above - also gives you three.
Multiple both 7 and 4 by this second three - gives you:
21 boys and 12 girls - so there are 9 more boys in the class.
21+12 = 33 total
Jesus Christ, why couldn't I see that!?!?!?Then divide the 9 overage by the 3 above - also gives you three.
Multiple both 7 and 4 by this second three - gives you:
21 boys and 12 girls - so there are 9 more boys in the class.
21+12 = 33 total
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