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From users who are members of Transition to university :
Chris Graham
|
said | Ready to use | 7 years, 11 months ago |
| Lauren Richards | said | Needs to be tested | 8 years ago |
| Elliott Fletcher | said | Has some problems | 8 years ago |
| Vicky Hall | said | Has some problems | 8 years ago |
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Chris Graham 7 years, 11 months ago
Gave some feedback: Ready to use
Chris Graham commented 7 years, 11 months ago
I've split off the prime numbers part into its own question and re-used the variables from part a) in b) and c), so that the parts lead on from eachother.
Elliott Fletcher 7 years, 11 months ago
Published this.Lauren Richards commented 8 years ago
In part c)i), ii) and iii), I really wanted the individual factors to be listed for each number, and then for the common factors in each individual list to be highlighted but I didn't know how to do this and I think Chris mentioned something would have to be created in order to do this.
Lauren Richards 8 years ago
Gave some feedback: Needs to be tested
Chris Graham commented 8 years ago
I had 25 marked as prime in part b). I think you may need to update the marking matrix after removing the choice below?
Chris Graham 8 years ago
Gave some feedback: Has some problems
Lauren Richards 8 years ago
Gave some feedback: Needs to be tested
Chris Graham 8 years ago
Gave some feedback: Has some problems
Chris Graham commented 8 years ago
I think I would avoid 1 as an option altogether in part (b). Whether 1 is prime or not will trip up a lot of students but is unlikely to be of importance in their studies; I think it's more important to test their knowledge of whether a number is or isn't composite, rather than catch them out on (arguably) a technicality.
RE your problem in the comment below: h/6 is less than 6 ~50% of the time, so you could either re-think your variables, or use
sortto arrange into the correct order, for example set up a new list of numbers containing the factors...sort([1,2,3,h/6,6...]).There's a mix of singular and plural in the statement. I think I would write "A number that can be...".
"divided evenly by whole numbers" would be better as "divided without remainder..." to avoid confusion with even numbers.
Part (c) in the advice does not provide much additional informtation. I guess you haven't included all of the factors as it would be a pain! That's fine I think.
Lauren Richards commented 8 years ago
- There is a slight problem with variable h in the table in that sometimes its divisors are not in the right order.
Lauren Richards 8 years ago
Gave some feedback: Needs to be tested
Elliott Fletcher 8 years ago
Gave some feedback: Has some problems
Elliott Fletcher commented 8 years ago
I think this is a really good question and it works well. Just a few comments
Main Parts
In the statement i would write a definition of composite as well as some students might not know what this means.
a) good
b) in the question i would write "Identify which of the following are prime numbers:" instead of "Identify the prime numbers from below."
One of the numbers here for me was 43, which is a prime number, however if you say it is a prime number it is marked incorrect as the displayed answer is that it is composite.
Advice
Good job getting the list of factors thing to work!
b) you could put the numbers in the table in the order that they appear in the question but it's up to you. I would also write "composite" instead of "not prime".
Also you could extend the table a little bit to the right, so that some numbers don't go onto a new line in the divisors column.
Lauren Richards 8 years ago
Gave some feedback: Needs to be tested
Lauren Richards 8 years ago
Gave some feedback: Has some problems
Lauren Richards 8 years ago
Gave some feedback: Needs to be tested
Vicky Hall commented 8 years ago
Also, the bit in the advice that says 'Whilst $1$ technically fits the criteria for a prime number, it is not considered a prime number' needs to be changed. $1$ does not meet the criteria for being a prime as it only divides by $1$, whereas all other primes have two distinct divisors, themselves and $1$.
Vicky Hall 8 years ago
Gave some feedback: Has some problems
Vicky Hall commented 8 years ago
I would change the title to 'Identifying prime numbers' to make it clearer what the question is about. In the question I would change the word 'composite' to 'not prime', just to make the language a bit simpler.
Lauren Richards 8 years ago
Gave some feedback: Needs to be tested
Lauren Richards 8 years ago
Created this.| Name | Status | Author | Last Modified | |
|---|---|---|---|---|
| Finding the highest common factor of two numbers | Ready to use | Lauren Richards | 20/11/2019 14:39 | |
| Prime numbers | Ready to use | Chris Graham | 17/06/2025 08:56 | |
| ggd om breuken te vereenvoudigen | draft | Johan Maertens | 30/11/2017 17:28 | |
| Marlon's copy of Prime numbers | draft | Marlon Arcila | 03/02/2018 16:22 | |
| HCF | draft | Radu Dragomir Manac | 06/11/2023 10:48 |
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This question is used in the following exams:
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