Let x be the number of girls Let y be the number of boys x + y = 473 -(1) 0.4x + 0.5y = 208 -(2) = > 0.8x + y = 416 -(3) (1) - (3) 0.2x = 57 x = 285 y = 473 - 285 = 188

C, interior angles

Thanks. Can explain what is interior angles?

For angles, it's Better to do it the legacy way, to write the reasons for each step. This way, it reinforces the understanding

Angles bounded by two parallel lines

Alternate angle

Pearlyn Koh How did you get alternate angles? I would think the most straightforward way is interior angles

I forgot the terms. Is this called alternate angles?

Oh... good one as well!

But how does angle e alternate angle c?

Angles on a straight line

Sum of Angles on straight line = 180deg

Thanks

Feel free to contact any of us here if you have questions

Thank you so much.

I think I have problem with my English. Pls help. Below is my solution: A:B:C. Written as 30:20:21. I have B lesser than C. But the question says B is more than C by 160g.

A:B. 30:20. (A 1.5 of B) A:C. 30:21. (C 0.7 of A) Dif C-B= 1unit°= 160g Total is 30+20+21= 71 units..

Oops!! I really did not read the question?

Yeo See Yeong, exactly what I think too. C is more than B. Not the other way around... That's why I post this question. ::: Confuse :::

Agreed with you folks. Ops up in the question.

So can I conclude that the question is wrong?

Aye. There is a mistake in the question.

Yeo See Yeong, Izam Marwasi & Xavier Sng, thank you so much for all your help. 👍👍👍😄

I believe I can speak on behalf of Izam and Mister Yeo, that the pleasure is ours. Regards

I would advise against drawing a model for this. Assume first that all 35 heads belong to chickens only. That would mean there are 70 feet. However the actual number of feet is 94, so that leaves 24 feet unaccounted for. If you stick two feet into each chicken, you have magically converted the chicken into a rabbit. With 24 feet, you can Harry Porter 12 chickens into 12 rabbits, meaning that there are 12 rabbits.

Suggested working : (94 - 35 x 2) divided by ( 4 - 2 ) = 12

Stick 2 feet into each chicken. Hahaha. Like the illustration.

Hehe, explaining this way to the kids helps to hold their attention while making them laugh.