Thanks Adrian for yr clear n detailed explanation

But the ratio 4:3 was mass of the box n nails only. Screws not included. (a) 480g?

Serene Koon, the box has a mass of 480 grams is correct.

How about (b) 440g?

You know you are right :) good job.

picture amended.

the first part of the model should show the final ratio of 4:3:3 instead of 4: 1.5 : 1.5

Thanks Caleb Tey for yr detailed explanation, Xavier Sng n Pauline Vong Nyit Li for prompt clarification.

All in a day's work. Thank you Serene, Caleb and Pauline.

Excellent model as always, Caleb.

and super duper careless

We have all been there, and continue to do so. Please don't beat yourself over the head :)

I like Caleb Tey 's solution.. esp the part "since the box did not change ..make the box the LCM".. That's thinking out of the box...LOL..

Agree with Izam. Please keep up the good work, Caleb.

@Xaiver Sng will have to always vet my workings. Too careless.

Carelessness is part and parcel of life. I am sure we will all manage :) please point out my mistakes when you spot them too, so thank you in advance.

1

9999 vs 10000

answer is 50000 I think

like that I don't know.

Huh? Isn't it 1?

not it isn't. So stick lor

-1? 9999-10000=-1

10000 - 9999 = 1

The answer is 1

Diff bet 9999 & -99999

but the books says answrr is 50000

Then the book is wrong.

thanks. I just needed confirmation I am not going craY or be stupid

1 digit :-P

Can u snap a photo of the question n answer fr that book?

Largest 4 digit is 9999 smallest 5 digit is 10000 so..10000 -9999 = 1

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