Tutor MathsGuru: Ask me for your burning Maths questions!

[Maths Monster]

delete

[Daddy]

Thanks Maths Monster & Vanilla Cake.


you all are thumb UP!!!.

Sorry, One more question.

1. During an IT fair, for each book sold, Leena received a commission of $20. An additional bonus of $10 would be given to her for every 5 books sold.

a) How much would Leena receive if she sold a total of 12 books?
My ans:
1 book = $20
5 books = ($20x5) + $10= $110

15 books = 15 /5 = 3 of 5 books
= 3 x $110
= $330

b) How many books had she sold if she was given $8880?
??? help.

Is my Qa correct ?

[Daddy]

Sorry,


for question a) How much would Leena receive if she sold a total of 12 books?
Is 15 books instead of 12.

Sorry...

[Vanilla Cake]

Daddy:

1. During an IT fair, for each book sold, Leena received a commission of $20. An additional bonus of $10 would be given to her for every 5 books sold.


a) How much would Leena receive if she sold a total of 15 books?
b) How many books had she sold if she was given $8880?

(a)
15 books = (5+5+5) books
Total amount received by Leena if she sold 15 books = 3(20x5+10) = $330

(b)
1 'set' =($20x5)+$10 = $110
$8880÷$110 = 80 r $80

$80÷$20= 4

Total number of books = 80(5)+4 = 400+4 = 404
If she was given $8880, she had to sell 404 books

[starlight1968sg]

Thanks very much to Dharma and Vanilla Cake for your solutions.

[YLH88]

Hi adhdadhd, Dharma,


Thank you very much!

[Daddy]

Thanks Vanilla Cake

[adhdadhd]

1. During an IT fair, for each book sold, Leena received a commission of $20. An additional bonus of $10 would be given to her for every 5 books sold.


a) How much would Leena receive if she sold a total of 15 books?

comm of 1 book = $20
comm of 15 books = $20x15= $300
bonus of 15 books = $10 x 15/5 = $30

Leena would rx $330.

b) How many books had she sold if she was given $8880?

For every 5 books she get $100 comm and $10 bouns, sum up to be $110.

For every 10 books, 10x$20 + 10/5x$10 = $220.

8800/220 = 40, thus 400 books
80/20=4

She sold 404 books.

Check: 400 books = 400x20 + 400/5x10 = 8000+800.

[firebird]

Dear maths guru


Good morning

Please help me on the following maths:

1) Susan saved $345 in $5, $10 and $50 notes. There were 35 notes althogether. She had 4 more $10 notes than $50 notes. How many $5 notes did she have?

2) Mr. Tan has some charity tickets. If he sends 4 tickets each to some companies, he will need 20 more tickets. However, if he sends 3 tickets each to the same companies, he will have a remainder of 50 tickets. How many tickets does he have.

3) Alex, Boon Kheng and Casmuri paid for a meal. Alex paid 1/5 of the amount Boon Kheng and Casmuri paid together, Boon Keng paid 1/4 of the amount Alex and Casmuri paid.

a) What fraction of the total cost of the meal did Casmuri pay?
b) If the meal cost $205.20, how much did Alex pay?

Thank you
firebird

[Vanilla Cake]

firebird:

1) Susan saved $345 in $5, $10 and $50 notes. There were 35 notes altogether. She had 4 more $10 notes than $50 notes. How many $5 notes did she have?

$5: 35-unit-unit-4 = 31-2units

$10: unit+4
$50: unit

5(31-2units)+10(unit+4)+50(unit) = 345
50units =150
1 unit = 3

$5: 31-2units = 31-2(3)=25
Sussan had 25 $5 notes.

firebird:

2) Mr. Tan has some charity tickets. If he sends 4 tickets each to some companies, he will need 20 more tickets. However, if he sends 3 tickets each to the same companies, he will have a remainder of 50 tickets. How many tickets does he have.

Instead of 3 tickets, each company is given 4 tickets, ie each company gets 1 more ticket.
With 50 tickets remain and 20 tickets short , total tickets issued = 50+20=70.

So each company receives 1 more ticket and 70 tickets are sent, number of companies =70 divided by 1 = 70.

Number of tickers = 4x70-20= 260

firebird:

3) Alex, Boon Kheng and Casmuri paid for a meal. Alex paid 1/5 of the amount Boon Kheng and Casmuri paid together, Boon Keng paid 1/4 of the amount Alex and Casmuri paid.

a) What fraction of the total cost of the meal did Casmuri pay?
b) If the meal cost $205.20, how much did Alex pay?

A : B+C
1 : 5
5 : 25

B : A+C
1:4
6:24

A:5
B:6
C:19

a) Fraction of the total cost of the meal that Casmuri paid = 19/30

30 units = $205.20
5 units = $34.20
b)Alex paid $34.20

Submitted by VC's mum.