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Secondary 1 | Maths
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Eris Tan KQ
Eris Tan KQ

Secondary 1 chevron_right Maths chevron_right Singapore

how do u do 10 and 11?

Date Posted: 5 years ago
Views: 241
Eric Nicholas K
Eric Nicholas K
5 years ago
For Q10, these are my thoughts.

37/16 = 2 + 5/16. So, a can be 1 or 2 (a cannot be 3 or more, because 37/16 = 3 - 11/16 and either b or c is bound to be negative).

Now, let’s say a = 1. Then 1 divided by (b + 1/c) is equal to 21/16. In other words, b + 1/c is 16/21. If b is a positive integer, c will definitely be negative. So a = 1 fails.

The only other case is a = 2, but does it work?

1 / (b + 1/c) = 5/16
b + 1/c = 16/5

Upon inspection, b has to equal 3 and c has to equal 5.

Hence, a = 2, b = 3, c = 5. Their sum is 10.

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Nicole
Nicole's answer
3 answers (A Helpful Person)
1st
Im not sure about 10, but i think this is how you work out q11?
Eris Tan KQ
Eris Tan KQ
5 years ago
okok! Thanks
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CheesePrata
Cheeseprata's answer
25 answers (A Helpful Person)
Answer to Qn 10 by deduction.