Q&A - P5 Math

[Michaelia0816]

oh! Pls scan using your printer and use full editor, scroll down and you insert the picture!

[highanxiety]

This question is ambiguous

There are multiple solution
1) 24 girls with 3 sweets each and 16 boys with 2 sweets each
2) 20 girls with 6 sweets each and 20 boys with 4 sweets each
3) 18 girls with 12 sweets each and 22 boys with 8 sweets each

[happyheart]

Can anyone help to solve? This sort of question carries 2 marks . How can We best present the solution? Thank you.


Q: Lawrence has some pens.
When he packs them into bundles of 5 pens in each bundle, he will have 3 extra pens.
When he packs them into bundle of 9 pens in each bundle, he will need another 8 pens. How many pens are there?

[highanxiety]

What message to decode?

[mummyv]

happyheart:

Can anyone help to solve? This sort of question carries 2 marks . How can We best present the solution? Thank you.


Q: Lawrence has some pens.
When he packs them into bundles of 5 pens in each bundle, he will have 3 extra pens.
When he packs them into bundle of 9 pens in each bundle, he will need another 8 pens. How many pens are there?

hi

am not sure if this is the easiest method for 2 marks! anyone got an easier way?

Difference is 8+3=11 cos compare (multiple of 9 Less8) & (multiple of 5 R3)
List multiples of 9 : 9,18,27,36
Use guess and check to find multiple of 5
18-11=7 wrong
27-11=16 wrong
36-11=25 correct
Work backwards
25 = 5x5
5x5+3=28 (multiple of 5 R3)
28+8=36 (multiple of 9 Less8)
Ans: 28

[Nebbermind]

mummyv:

happyheart:

Can anyone help to solve? This sort of question carries 2 marks . How can We best present the solution? Thank you.


Q: Lawrence has some pens.
When he packs them into bundles of 5 pens in each bundle, he will have 3 extra pens.
When he packs them into bundle of 9 pens in each bundle, he will need another 8 pens. How many pens are there?

hi

am not sure if this is the easiest method for 2 marks! anyone got an easier way?

Difference is 8+3=11 cos compare (multiple of 9 R8) & (multiple of 5 R3)
List multiples of 9 : 9,18,27,36
Use guess and check to find multiple of 5
18-11=7 wrong
27-11=16 wrong
36-11=25 correct
Work backwards
25 = 5x5
5x5+3=28 (multiple of 5 R3)
28+8=36 (multiple of 9 R8)
Ans: 28

Not able to provide the solution but when bundled in 9s, the remainder is 1 and not 8.

[mummyv]

Nebbermind:

Not able to provide the solution but when bundled in 9s, the remainder is 1 and not 8.

Hi
I used the wrong term not R8 but Less 8 according to the question. To avoid confusion will edit my earlier post.

[Mychildren]

I worked it in this way:


_ x5 + 3 = Ans
10 + 3 = 13
15 + 3 = 18
25 + 3 = 28;

_ x 9 - 8 = Ans
18 - 8 = 10
27 - 8 = 21
36 - 8 = 28

So 28 is the answer.

[mummyv]

Mychildren:

I worked it in this way:


_ x5 + 3 = Ans
10 + 3 = 13
15 + 3 = 18
25 + 3 = 28;

_ x 9 - 8 = Ans
18 - 8 = 10
27 - 8 = 21
36 - 8 = 28

So 28 is the answer.

This way is so much easier thanks sometimes i just make it too complicated

[happyheart]

Thank you, the method looks simplified enough:)