Thank u! Is there a way to do without algebra ?

I thought model method normally includes one unknown. I could be wrong but I find this the easiest way of solving for me. Maybe some other person can find a better or simpler way for you.

Ah OK. I forgot have to change to standard form

You understand how to do right? Cannot leave as 0.5 have to put 5 x 10 power (-1)

Hi, thanks for your reply, I just checked the answer, question 10a(I) and (II) a bit wrong

Can you tell me the answer pls

Oh, because 0.5 change to 5 the power in the 10 need to -1 right?

Yes

Thanks a lot

Hi. This is for a(i)

For a(ii)

Lastly, for (b)

Sorry, i think ans for B is wrong... they r askg for no. Of cubes needed, not painted. Can help?

Definitely. This is a challenging visualisation question so each pattern is dissected into layers. There are two images in total.

And the second image.

Thks

Thks

One more step. 5050 x 3 to find the total surfaces painted.

Hi. You may refer to the image for the solution.

Why every 4 mins. ..don't understand...

See the image for an explanation. Hope it answers your question.:)

Need to see later...trying. .

1:5 --> 3:15 2:7 --> 4:14 overall ratio = (3+4) : (15+14) = 7:29

What is the logic/ principle behind it?

since the 2 jugs are identical, they have the same capacity. so just make the sum of the 2 numbers in each ratio equal. then u can add ul

Hi Gek Poh. Allow me to explain the concept. Each jug is 'identical', hence the total capacity of liquids is the same and thus, the number of units representing the total must be the same. Therefore, find the lowest common multiple for the total number of units. For Jug 1; Orange : Water : Total = 1 : 5 : 6 = 3 : 15 : 18 For Jug 2; Orange : Water : Total = 2 : 7 : 9 = 4 : 14 : 18 Combined contents of jugs; Orange : Water : Total = (3 + 4) : (15 + 14) : (18 + 18) = 7 : 29 : 36 Therefore the ratio is 7:29. Omit the total part ... that is merely to help the student understand better. I've been teaching math since 2010 so I understand that sometimes students tend to rush when they thought that they had understood the question as something a lot simpler. I hope this helps.

Bravo bravo.. waiting for him to come back and show him..thanks all