Q&A - P4 Math

[Poppet]

During a quiz, a correct answer would be awarded 3 points while 2 points would be deducted for a wrong answer.For every 6 questions attempted, Kathy managed to get 5 of them correct.Given that Kathy scored a total of 104 points, how many questions did Kathy answer correctly?


Can anyone help to solve this problem sum?

:thankyou: :?:

[MathIzzzFun]

Poppet:

During a quiz, a correct answer would be awarded 3 points while 2 points would be deducted for a wrong answer.For every 6 questions attempted, Kathy managed to get 5 of them correct.Given that Kathy scored a total of 104 points, how many questions did Kathy answer correctly?


Can anyone help to solve this problem sum?

:thankyou: :?:

Score for each set of 6 questions (5 correct, 1 wrong)
= 5 x 3 - 2 = 13

104/13 = 8 sets --> 8 x 5 = 40

Kathy answers 40 questions correctly.

cheers.

[fohope]

Hi,

Pls help me with this question. Thank you in advance.

The total cost of 2 books and 3 pens is SGD43.
Each book costs S$4 more than the total cost of the 3 pens.
What is the cost of the book and pen?

[tianzhu]

fohope:

Hi,

Pls help me with this question. Thank you in advance.

The total cost of 2 books and 3 pens is SGD43.
Each book costs S$4 more than the total cost of the 3 pens.
What is the cost of the book and pen?

Hi

Please confirm.

Each book costs S$4 more than the total cost of the 3 pens or the cost of 1 pen?

Best wishes

[fohope]

Hi Tianzhu,


The question is correct.

Thanks.

[tianzhu]

Hi fohope


Basing on the original question, you still can get an answer, but it’ll not be in nice whole numbers.

(3P+4) + ((3P+4) + 3P ---- 43

The answers will be in decimals.

Best wishes

[arthurt]

Hi,


Need help on this question.

Mr Imran paid a total of $120 for 6 plates and 8 cups. If each plate costs twice as much as a cup, find the cost of a dozen plates.

Thanks

[tianzhu]

arthurt:

Hi,


Need help on this question.

Mr Imran paid a total of $120 for 6 plates and 8 cups. If each plate costs twice as much as a cup, find the cost of a dozen plates.

Thanks

Hi

There are a few options.You may use MD,letters of the Alphabet or Units.

Alphabet Method

Each plate costs twice as much as a cup.

P ----2C

Mr Imran paid a total of $120 for 6 plates and 8 cups.

12C + 8C ------ 120

20C ------ 120

C ------ 6

Cost per plate ------ 12

Cost of a dozen plates ------144

Units Method

C ----- 1u

P ---- 2u

20u ------ 120

1u ------- 6

2u -------12

Cost per plate ------ 12

Cost of a dozen plates ------144

Best wishes

[Poppet]

May sold 15 packets of salt and some packets of sugar.1 over 6 of the packets sold were salt.How many packets of sugar were sold?


Can someone solve this?

[PapayaDad]

1/6 = salt so 5/6 = sugar


since 1/6 = 15

5/6 = 15 x 5 = 75