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Secondary 1 | Maths
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jaz
Jaz

Secondary 1 chevron_right Maths chevron_right Singapore

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Date Posted: 3 years ago
Views: 286
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2 years ago
a) 315 = 3^2×5×7
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2 years ago
b) make 315 a square number.

so then there should be 5×7=35 more tiles.

area of the large square
= (315+35)×30×30
= 315 000 cm^2

hope this helps!
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2 years ago
c) qn is asking for HCF of 168 and 315.

315 = 3^2×5×7
168 = 2^3×3×7

HCF if 315 and 168
= 3×7
= 21