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Lauren Richards 2 years, 2 months 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.
Chris Graham 2 years, 2 months 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...
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.
Elliott Fletcher 2 years, 2 months ago
I think this is a really good question and it works well. Just a few comments
In the statement i would write a definition of composite as well as some students might not know what this means.
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.
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.
Vicky Hall 2 years, 2 months 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 $1$.
|Finding the highest common factor of two numbers||Ready to use||Lauren Richards||01/08/2017 11:30|
|Prime numbers||Ready to use||Chris Graham||01/08/2017 11:31|
|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|
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This question is used in the following exams:
- trial run by Lesley Davis in Lesley's workspace.
- Divisibility and factors of integers by Christian Lawson-Perfect in Transition to university.
- maths practice-revision by David Martin in David's workspace.
- Nick's copy of Divisibility and factors of integers by Nick Walker in Nick's workspace.
- Blathnaid's copy of Nick's copy of Divisibility and factors of integers by Blathnaid Sheridan in Blathnaid's workspace.
- MATH1601 Quiz 1 by Blathnaid Sheridan in Blathnaid's workspace.
- Divisibility and factors of integers by Simon Thomas in Foundation mathematics.