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primary 5 | Maths | Percentage
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Lin Sipei
Lin Sipei

primary 5 chevron_right Maths chevron_right Percentage chevron_right Singapore

Hello all, apart from guess and check, is there any better method to solve this problem? Thank you in advance!

Date Posted: 1 year ago
Views: 149
AC Lim
AC Lim
1 year ago
Can use
Let number of people = u
3u + 42 = 8u - 47
5u = 89
1u = 89/5
But the answer for this question no valid. Question wrong.... ;(
Eric Nicholas K
Eric Nicholas K
1 year ago
Because he hands out 5 more pencils to each pupil, the situation goes from 42 pencils extra to 47 pencils not enough. This is a difference of 89 pencils in quantity.

The extra 89 pencils decide how many students there are in the class.

Number of students = 89/5
= “17.8”

Other than the fact that the question seems flawed, this is the technique to solve such questions.

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