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# CR9 seeks help for son's mathematics homework

• CR9, if your son needs Chemistry help, he can post his questions here and I'll advise. For Mathematics, you'll have to see if anyone's willing to reply. The mathematics experts WeeWS and Eagle only drop by here occasionally.

CR9 posted :

can anyone help me with my son's homework? I could do the 3rd and 4th ones but left smoked for the rest:(

https://imgur.com/a/uZjai

• (i) is just finding common factor.

(ii) is ambiguous... how can you cancel the 6 just like that? This is not division, or any other recognized mathematical method.

(iii) the question already doesnâ€™t make sense. If follow the equation stated in the question, the second number is 3, not 2.

What kind of question is this?

Is this a joke?

Donâ€™t insult our intelligence leh.

• .
• Hi

(i) If we rearrange, we get

(10p + d) / (10d + q) = p/q

Comparing, we get
p = 1, q = 4 and d = 6

(ii) Expanding the first equation, we get
10pq + dq = 10 pd + pq
9pq + dq - 10pd = 0

I am unsure of the syllabus, of the level, at which this question is pitched at.
So, I would do a trial and error method to solve, which may or may not be in syllabus given the lack of information