Victor Mildew wrote:Im so strawberry floating thick with maths, I genuinely have to count on my fingers
Whatever helps I do taps (on my head, or on the exercise book with a pen) to help me keep track of where I am in a count.
I'm just petrified of strawberry floating up thanks to my dad givng up trying to teach me when I was young. Thanks dad I'm glad he didn't try his hand at teachng me English or I'd have been seriously strawberry floated.
I wouldn't have even known how to begin doing that There are three calculator challenges on this homework. The first one (which I again didn't notice said a calculator was allowed) I managed to figure out on paper rarther easily as it had a number to work with at the start, but this one... I don't even know why I'm supposed to just *know* some of the facts I'm reading in here.
Memento Mori wrote:Algebra is how I did this. Call the number of guests x.
x/3 + 5x/12 + 24 = x So making everything on the left side have a common denominator:
4x/12 + 5x/12 + 288/12 = x
(9x +288)/12 = x
9x +288 =12x 288= 3x 96= x
Hopefully I'll understand this in my third year of doing GCSE maths.
I would seriously consider trading a limb to have a good grasp of maths. A shame I actually have to work at it.
The thing with maths is there are almost always multiple ways to approach a calculation as people here have already shown, so my advice is to find the general approaches that make the most sense to you and stick with them.
Calling it a "calculator challenge" might actually be a little confusing, think of it more as a logic puzzle. You probably don't need a calculator to work it out, the reason it's allowed is because they want the question to test your logic and not your multiplication.
The trick to this kind of question is seeing what you can work out based on what you are told. You are told the fraction of people that chose two out of three meals, so you can work out the third fraction of people as whatever fraction is remaining.
An easier version of the question would be:
There is an amateur football match.
All of the fans present support either the home team or the away team.
7/10 of the fans support the home team.
30 fans support the away team.
How many fans are there in total?
If 7/10 support the home team, then 3/10 must support the away team. If 30 people are three tenths, then the total number of people is 100.
It's the same logic in your question, just with harder numbers.