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primary 5 | Maths
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Gelene
Gelene

primary 5 chevron_right Maths

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Date Posted: 6 years ago
Views: 342

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korathlee
Korathlee's answer
14 answers (A Helpful Person)
1st
did part (b) using pairing (1 and 100, 2 and 99, 3 and 98, etc). There will be 50 pairs of 101 since there are 100 numbers. Alternatively u can always use the method (n(n+1))/2 which is faster but i doubt is tested in primary sch.
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Student01
Student01's answer
63 answers (A Helpful Person)
a)28 black triangle
b)5050 white triangle