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Primary 3 Maths Singapore

Please advise.

Date Posted: 5 years ago

Val Val

5 years ago

The hints is it will+123...

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Hope this help

Date Posted: 5 years ago

5 years ago

Thanks.
Is there any way to find the pattern?

AC Lim

5 years ago

Yes
Can use formula: F x (F+1) / 2
Example Figure 7 = 7x(7+1)/2 =28

AC Lim

5 years ago

If they give total triangle =91
Therefore
Fx(F+1)/2 =91
Fx(F+1) = 182
13 x 14 = 182
Answer figure 13 have 91 triangle.

5 years ago

Thanks alot.

Wow. That’s quite tough for P3.