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primary 5 | Maths
| Whole Numbers
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Need help for 7 (c)
Thanks
Date Posted: 4 years ago
Views: 207
multiple of 5:
last digit can be 0 or 5
smallest no.: 1st digit can be 0
01895 ?
last digit can be 0 or 5
smallest no.: 1st digit can be 0
01895 ?
Either the person who prepared this question unintentionally left out the key phrase "5-digit" or the question is really meant to be as such, to catch students off guard.
With there being no "5-digit number" condition, we can put "0" as the first digit.
(The question only mentioned using all the digits, but did not mention that the resulting number must be 5 digits long).
So, Snell is correct. The smallest number which is a multiple of 5 is 01895 (by putting 5 in the last digit, followed by 0, 1, 8 and 9 in order).
With there being no "5-digit number" condition, we can put "0" as the first digit.
(The question only mentioned using all the digits, but did not mention that the resulting number must be 5 digits long).
So, Snell is correct. The smallest number which is a multiple of 5 is 01895 (by putting 5 in the last digit, followed by 0, 1, 8 and 9 in order).
Use all the digits means it is 5-digit number. It doesn’t make sense a number starts with 0. Unless you are buying 5D :)
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Ur answer
Date Posted:
4 years ago
They never mentioned that it must be a smallest 5-digit number.
They only mentioned the smallest number using all 5 cards.
So it must be 1598 (01598).
(The smallest 5-digit even number would be 10598)
Part c is similar.
They only mentioned the smallest number using all 5 cards.
So it must be 1598 (01598).
(The smallest 5-digit even number would be 10598)
Part c is similar.
Hmm … a bit of disagreement over how to interpret the wording.
I believe that when the question says "use ALL the digits …", it should mean the number must contain all 5 digits.
… so answers given by Jibolo should be the correct answers.
I believe that when the question says "use ALL the digits …", it should mean the number must contain all 5 digits.
… so answers given by Jibolo should be the correct answers.
Omitting the phrase “5-digit...” will leave some room for confusion for the reader though.
Most other questions of this type will include the “5-digit” phrase. So this particular question, in my opinion, is not optimally phrased.
This is why in exams, a good paper will produce questions which not have ambiguities in the meanings (typical of Cambridge exams for the O and A levels).
Most other questions of this type will include the “5-digit” phrase. So this particular question, in my opinion, is not optimally phrased.
This is why in exams, a good paper will produce questions which not have ambiguities in the meanings (typical of Cambridge exams for the O and A levels).
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