Q&A - P5 Math

[php]

concerned1970:

1) For every radio that George assembled, he earned $8. A commission of $6 was paid to him for every 50 radios he assembled. How many radios must he assemble to earn $4236?

50 radios --> ($8 x 50) x $ 6 = $406
$4236 / $406 = 10 R 176
No of radios assembled --> (50 x 10) + ($176 / $8) = 522

[tianzhu]

concerned1970:

2) Calvin had some marbles. He gave 63 of them to Danny and 2/5 of the remainder to Ellen. After that, he found that he still had 1/4 of his marbles left. A) What fraction of his marbles did he give to Danny? B) How many marbles did Calvin have at first?

Hi

You may work with units or MD.

¼ of marbles --------- 3 units

Total marbles -------- 12 units

7 units ------- 63
1 unit ------- 9

He gave to Danny 63/108 or 7/12 of his marbles.

Calvin had 108 (12*9) marbles at first.

Best wishes

[tianzhu]

concerned1970:

3) A packet of potato chips cost twice as much as a packet of nuts. John spent 3/5 of his money on 9 packets of potato chips. What was the most number of packets of nuts he could buy with the rest of his money?

Hi

3/5 or 3 units ------- 9 packets of potato chips
3/5 or 3 units ------- 18 packets of nuts

1 unit ------- 6 packets of nuts

2 units ------ 12 packets of nuts

Best wishes

[tianzhu]

concerned1970:

4) Two ropes, P and Q, were each cut into 3 equal pieces. Each piece cut from Rope Q was 2/5 longer than each piece cut from Rope P. if Rope P was 2m long, how long was Rope Q?

Hi

1 piece of rope P -------- 5 units
1 piece of rope Q -------- 7 units

15 units -------- 2 m

3 units -------- 2/5 m

21 units --------2/5*7 --------2.8m

Best wishes

[tianzhu]

concerned1970:

5) Roy had a piece of string 3.5m long. He used 2/5 of it to tie a present and 3/7 of the remaining to tie a bundle of sticks. What was the length of the string used to tie the bundle of sticks? Is the answer correct?---->1-2/5=3/5, 3/5x3/7=9/35, 9/35x3.5=0.9 (Final answer)

Hi

1 - 2/5 ----- 3/5

3/5 * 3.5 ------ 2.1

3/7 * 2.1 ------ 0.9

Best wishes

[concerned1970]

Tysm Tianzhu and Php for yr help!

[S6169]

tianzhu:

concerned1970:

4) Two ropes, P and Q, were each cut into 3 equal pieces. Each piece cut from Rope Q was 2/5 longer than each piece cut from Rope P. if Rope P was 2m long, how long was Rope Q?

Hi

2/5 ----- 0.4

0.4*3 ------ 1.2

2 + 1.2 ------ 3.2

Rope Q ------ 3.2m

Best wishes

Sorry, a bit confuse here,
\"Each piece cut from Rope Q was 2/5 longer than each piece cut from Rope P\", 2/5 is fraction or refer to 2/5 m?
If it refer to the fraction, then should be 2*(1+2/5)=2.8m

[tianzhu]

S6169:

Sorry, a bit confuse here,
\"Each piece cut from Rope Q was 2/5 longer than each piece cut from Rope P\", 2/5 is fraction or refer to 2/5 m?
If it refer to the fraction, then should be 2*(1+2/5)=2.8m

Hi

Thank you for pointing out the error.

It should be 2/5 (fraction) not 2.5m

2.8 m is the correct answer.

Best wishes

[dyandp]

Hi Parents, anyone has idea how to workout this question , pls help ...


Three sisters Lisa , Ming and Nora shared the cost of a present for their father. Lisa paid 1/4 of the total share of Ming and Nora.
Ming paid 1/9 of the total share of Lisa and Nora.
Nora paid $60 more than Ming. How much did the present cost ?


Any help very much appreciated.

[dyandp]

Hi Parents, anyone has idea how to workout this question , pls help ...


Jason and Kevin were given some money each. If Jason and Kevin spent $100 and $50 each day respectively. Jason would have $1300 when Kevin had spend all his money. if Jason and Kevin spent $50 and $100 each day respectively, Jason would have $3700 when Kevin had spent all his money.
how much money was given to Jason at the beginning ?

Any help very much appreciated. :please: