Q&A - P3 Math

[corneyAmber]

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[hypergatak]

Thanks for prompt response. My son is so dissappointed as he got a different answer. He is perstering me to ask another question:-


Mr Lim has some sweets and packets. When he packs the 4 sweets per packet, there would be 15 sweets left. When he packs 6 sweets per packet, there would be 3 sweets left. How many sweets does he have?

Thanks.

[Superbugs]

hypergatak:

Thanks for prompt response. My son is so dissappointed as he got a different answer. He is perstering me to ask another question:-


Mr Lim has some sweets and packets. When he packs the 4 sweets per packet, there would be 15 sweets left. When he packs 6 sweets per packet, there would be 3 sweets left. How many sweets does he have?

Thanks.

This is a P4 question?
Using Lowest Common Multiple

Multiple of 4 plus excess of 15
19,23,27,31,35,39
Multiple of 6 plus excess of 3
9,15,21,27,33

So the answer is 27.

[corneyAmber]

hypergatak:

Thanks for prompt response. My son is so dissappointed as he got a different answer. He is perstering me to ask another question:-


Mr Lim has some sweets and packets. When he packs the 4 sweets per packet, there would be 15 sweets left. When he packs 6 sweets per packet, there would be 3 sweets left. How many sweets does he have?

Thanks.

What answer did he get? He has to remember that for any given total distance between 2 items, must always add the last item to close the boundary of the total distance. This is a common mistake kids will make, take 24/3 = 8.

As for this new question, usually the question is given such that both packages will face a constraint, eg pack of 4 left 3,2,1 but in this case, left over is 15, so is rather unusual but it can be solved.

Here's my logical check and guess answer:
Multiples of 6 < 18 is not possible since remainder for pack of 4 is 15.
18 -> 18+3 – 15 = 6 (not divisble by 4)
24 -> 24+3 – 15 = 12 (divisible by 4)

So he has 27 sweets.
Pack of 6, remainder 3
Pack of 4 for 12, remainder 15

[tianzhu]

hypergatak:

Thanks for prompt response. My son is so dissappointed as he got a different answer. He is perstering me to ask another question:-


Mr Lim has some sweets and packets. When he packs the 4 sweets per packet, there would be 15 sweets left. When he packs 6 sweets per packet, there would be 3 sweets left. How many sweets does he have?

Thanks.

Hi

This is a question on Gap and Difference or Excess and Shortage.

15 – 3 ------ 12
6 – 4 ------ 2
12/2 ------6

There are 6 packets
Number of sweets ------- (4*6) + 15 ------- 39

Best wishes

[concerned1970]

Gd evening! A ques from Taonan paper.


Apple x Pear=60
Apple x Apple x Pear=360
Find the value of Pear x Pear x Pear? Ty in adv!

[teh_oh]

concerned1970:

Gd evening! A ques from Taonan paper.


Apple x Pear=60
Apple x Apple x Pear=360
Find the value of Pear x Pear x Pear? Ty in adv!

Apple x Pear = 60
Apple x Apple x Pear = Apple x 60 = 360
Apple = 360/60 = 6
Apple x Pear = 6 x Pear = 60
Pear = 60/6=10
Pear x Pear x Pear = 10x10x10=1000

[corneyAmber]

concerned1970:

Gd evening! A ques from Taonan paper.


Apple x Pear=60
Apple x Apple x Pear=360
Find the value of Pear x Pear x Pear? Ty in adv!

Apple x (Apple x pear) = 360
Apple x 60 = 360
Apple = 360/60 = 6

Pear = 60/6 = 10

Pear x Pear x Pear = 10 x 10 x 10 = 1000

[concerned1970]

ksi:

concerned1970:

Gd evening! A ques from Taonan paper.


Apple x Pear=60
Apple x Apple x Pear=360
Find the value of Pear x Pear x Pear? Ty in adv!

Apple x (Apple x pear) = 360
Apple x 60 = 360
Apple = 360/60 = 6

Pear = 60/6 = 10

Pear x Pear x Pear = 10 x 10 x 10 = 1000

Thanks Ksi and Teh_oh! Sry now i understand!

[teh_oh]

concerned1970:

ksi:

[quote=\"concerned1970\"]Gd evening! A ques from Taonan paper.


Apple x Pear=60
Apple x Apple x Pear=360
Find the value of Pear x Pear x Pear? Ty in adv!

Apple x (Apple x pear) = 360
Apple x 60 = 360
Apple = 360/60 = 6

Pear = 60/6 = 10

Pear x Pear x Pear = 10 x 10 x 10 = 1000

Thanks Ksi and Teh_oh! but why is that pear (60) still has to divide by 6?[/quote]Because Apple x Pear = 60.
Apple is 6, so to find pear, have to 60/6.