Q&A - P5 Math

[HAPPYH]

Please help! Thanks.

A group of people met at a party. Each person shook hands with everyone else. Mr Li shook hands with 3 times as many men as women. Mrs Li shook hands with 4 times as many men as women. How many men and how many women were there at the party?

16 men and 5 women

[hnghng]

Hi Happyh,

Thanks for your reply.
Can I have the working pls. Thanks alot

[Caseygan]

nice solution!

[ILLUSDUCA]

Please help! Thanks.

A group of people met at a party. Each person shook hands with everyone else. Mr Li shook hands with 3 times as many men as women. Mrs Li shook hands with 4 times as many men as women. How many men and how many women were there at the party?

Hello hnghng,

For Mr Li,
M : W
3 : 1, total 4

For Mrs Li,
M : W
4 : 1, total 5

However, the total number of handshakes for Mr Li and Mrs Li should be the same. Therefore we should make the total we have for our ratio earlier the same. Doing so we multiply the first ratio by 5 and the second one by 4. And we will get

For Mr Li,
M : W
15 : 5, total 20

For Mrs Li,
M : W
16 : 4, total 20

Therefore, the total number of men is 16 and for women it is 5.

A similar question was discussed here:
http://www.youtube.com/watch?v=eFxEvV6nKS0

Hope this helps!

[hnghng]

Hi ILLUSDUCA,

Thanks you very much :-).

[HAPPYH]

Hi ILLUSDUCA,

Thanks you very much :-).

Hi I am so sorry. I did not log into the forum last night. Anyway ILLUSDUCA provided the solution. all the best

[hnghng]

Thanks you ILLUSDUCA & HAPPYH

[HAPPYH]

Please help! Thanks.

A group of people met at a party. Each person shook hands with everyone else. Mr Li shook hands with 3 times as many men as women. Mrs Li shook hands with 4 times as many men as women. How many men and how many women were there at the party?

Hello hnghng,

For Mr Li,
M : W
3 : 1, total 4

For Mrs Li,
M : W
4 : 1, total 5

However, the total number of handshakes for Mr Li and Mrs Li should be the same. Therefore we should make the total we have for our ratio earlier the same. Doing so we multiply the first ratio by 5 and the second one by 4. And we will get

For Mr Li,
M : W
15 : 5, total 20

For Mrs Li,
M : W
16 : 4, total 20

Therefore, the total number of men is 16 and for women it is 5.

A similar question was discussed here:
http://www.youtube.com/watch?v=eFxEvV6nKS0

Hope this helps!

Nice explanation - Thank you so much.

[ILLUSDUCA]

One more question pls !!
Box A contains 50 cents coins and Box B contains 20 cents coins. There are 19 more coins in Box B than in Box A. But the amount of money in Box A is $1.30 more than the amount of money in Box B. How much money is in Box A?

Hi again,

If the number of coins in both boxes is the same, then we would have 19 x $0.5 more, which is $9.5 more. Adding this to the existing amount A has more than B, we have a total of $10.8 more in A than B.

One $0.5 is more than one $0.2 by $0.3.
So, to get $10.8 more, we need $10.8 / $0.3 = 36 sets

This means there are 36 twenty cents coins and 36-19 = 17 fifty cents coins.

Total value in A = 17 x $0.5 = $8.5

Hope this helps!

[ILLUSDUCA]

Please someone help on this question.. Thanks so much!

Dora has 2 litres of milk. She used 7/12 litre to make strawberry milkshake. The remaining milk was used to make chocolate milkshake .
A) How much milk was used to make chocolate milkshake?
B) how much more milk did she use to make chocolate milkshake than strawberry milkshake ?

Hi Belnanna,

Not sure if the question was intended to simply be a fraction question or...
anyway,
a) 2 litres - 7/12 litres = 1 & 5/12 litres
b) 1 & 5/12 lites - 7/12 litres = 5/6 litre

Hope this helps