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primary 6 | Maths | Ratio
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Bliss
Bliss

primary 6 chevron_right Maths chevron_right Ratio chevron_right Singapore

Confused by the question. Hope teachers can help with explanation

Date Posted: 10 months ago
Views: 124
sstrike
Sstrike
10 months ago
Ques error?
can pls share the Qn source? TIA

in the end
A : B
3 : 1
3u : 1u

at first (before)
A : B
1u+92 : 1u+28 [28+64=92]

change
B → 28÷2 = 14 moves
3u = 1u+92+14
u = 53

A at first
1u+92 = 145 (Ans)
Bliss
Bliss
10 months ago
No error i suppose. From school.
sstrike
Sstrike
10 months ago
Do u hv the ans w you?
Bliss
Bliss
10 months ago
No answer ☹️
sstrike
Sstrike
10 months ago
Do you understand why I suspected the question is wrong or the number is not friendly?
Bliss
Bliss
10 months ago
Ya probably number error. I check with school tomorrow. Thank you teacher
Bliss
Bliss
10 months ago
Teacher, your answer is correct. Its 145

See 2 Answers

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sstrike
Sstrike's answer
5603 answers (A Helpful Person)
Bliss
Bliss
10 months ago
Thk you for the clear explanation.
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Shawn Wong
Shawn Wong's answer
61 answers (Tutor Details)
1st
After model explanation: Given he removed 28 buttons from box B, he would have added 28 / 2 = 14 buttons to box A.

The final ratio of 4 :1 is the ratio based on the After model as follow (Box A + Box B) : Box B. As with all models, the goal is always to find what 1unit is worth, then the rest of the model can be solved no matter the question being asked.
sakurauiky
Sakurauiky
10 months ago
Based on this
11-28=-17?
Does it make sense?
Bliss
Bliss
10 months ago
Thank you everyone. The answer however is 145.