Tricky Questions
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Tricky Questions
Can somebody help us solve these questions?
1. Sharpay is going shopping for some new stationery.
She can buy 3 pencils and 1 ruler for 50p, or 2 pencils and 2 rulers for 56p.
How much does each pencil cost?
2. In a magic square, the total for each row, column and diagnol is the same.
What is the value of m?
(sorry, I cannot draw the magic square, but I am sure you guys will get the idea)
? 4 17
? ? m
5 ? ?
I would very much appreciate if someone can assist in solving these questions.
1. Sharpay is going shopping for some new stationery.
She can buy 3 pencils and 1 ruler for 50p, or 2 pencils and 2 rulers for 56p.
How much does each pencil cost?
2. In a magic square, the total for each row, column and diagnol is the same.
What is the value of m?
(sorry, I cannot draw the magic square, but I am sure you guys will get the idea)
? 4 17
? ? m
5 ? ?
I would very much appreciate if someone can assist in solving these questions.
Re: Tricky Questions
3pencils and 1ruler costs 50p
6 pencil and 2 ruler costs 100p
2pencil and 2ruler costs 56p
So 4 pencil costs 44 p (subtracting the 2 lines)
So 1 pencil costs 11p
6 pencil and 2 ruler costs 100p
2pencil and 2ruler costs 56p
So 4 pencil costs 44 p (subtracting the 2 lines)
So 1 pencil costs 11p
Re: Tricky Questions
Errr - that's a bit complicated.
3 pencils and 1 ruler for 50p
2 pencils and 2 rulers for 56p, so easier to say that 1 pencil and 1 ruler is 28p.
This means the extra 2 pencils cost 22p ie 11p each..
3 pencils and 1 ruler for 50p
2 pencils and 2 rulers for 56p, so easier to say that 1 pencil and 1 ruler is 28p.
This means the extra 2 pencils cost 22p ie 11p each..
Re: Tricky Questions
That's a bit illogical alright.
In my method the ruler is eliminated and only left with pencil. You. Your method does not explain the leap if faith.
In my method the ruler is eliminated and only left with pencil. You. Your method does not explain the leap if faith.
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Re: Tricky Questions
hmm .. I would do it G55's way, there are often questions around where it comes down to an amount for a basic unit eg 1 apple + 1 orange + 1 raspeberry and all other answers come from there.
Re: Tricky Questions
There are several factors to consider here..child's ability, time pressure, etc..
It's a case of horses for courses, as long as the principle is grasped and repeated successfully, then getting the right answer is the main consideration.
It's a case of horses for courses, as long as the principle is grasped and repeated successfully, then getting the right answer is the main consideration.
Re: Tricky Questions
Your method is much longer - I have 'subtracted' the rulers because there are the same number in each sentence.
As a teacher I recommend to 'keep it simple' ...
As a teacher I recommend to 'keep it simple' ...
Re: Tricky Questions
Thank you so much. I hope I can explain this to my DD properly though.
Anybody with thoughts on the 2nd question? Its a number grid which I wasn't able to draw
Anybody with thoughts on the 2nd question? Its a number grid which I wasn't able to draw
Re: Tricky Questions
As a chartered engineer I personally prefer to teach from first principles; then if a question is worded differently but uses the same process, then child is not thrown backwards for six.
Re: Tricky Questions
But your method overcomplicates it - and we are off topic
Perhaps that's the difference between mathematicians and engineers
Perhaps that's the difference between mathematicians and engineers