Kel's answer to Fuzzy's Primary 5 Maths Whole Numbers Singapore question.
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At first: In the end:
S - A : T - S. S - A : T - S
9 - 5 : 11 - 9. 3 - 1 : 4 - 3
4 : 2. 2 : 1 (x2)
4 : 2
(Constant difference concept)
Hence in the end. At first
A : S : T. A : S : T
1 : 3 : 4 (x2). 5 : 9 : 11
2 : 6 : 8
5u - 2u or 9u - 6u or 11u - 8u
= 3u = 12
1u = 12/3 = 4
T (at first) = 11u
= 11 x 4
= 44 cookies (Ans)
S - A : T - S. S - A : T - S
9 - 5 : 11 - 9. 3 - 1 : 4 - 3
4 : 2. 2 : 1 (x2)
4 : 2
(Constant difference concept)
Hence in the end. At first
A : S : T. A : S : T
1 : 3 : 4 (x2). 5 : 9 : 11
2 : 6 : 8
5u - 2u or 9u - 6u or 11u - 8u
= 3u = 12
1u = 12/3 = 4
T (at first) = 11u
= 11 x 4
= 44 cookies (Ans)
Date Posted:
2 years ago
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