Tutor MathsGuru: Ask me for your burning Maths questions!

[starlight1968sg]

Chan09:

Need some help :stupid:


Harry and 5 friends share a cake equally for tea. If Harry gave away 2/3 of her share, what fraction of the cake had she left?
Ans: 1/18

Take the cake and divide into 6 parts.
So Harry gets 1/6 of the cake. Since she gave away 2/3 of her share, she has 1/3 * 1/6 = 1/18 of the cake left.

[violet04]

Hi, pls help to solve the following Maths sums with model, thks.



David had some apples in a box.
He sold 47 apples.
He bought another 25 apples and threw away 60 rotten ones.
He then had 123 apples left.
How many apples did David have at first.

[Jcong]

Alan, Ben, Caleb , Danny and Eric took part in a Weiqi competition. At the moment, the number of games played is shown below:


Alan has played 4 games
Ben has played 3 games
Caleb has played 2 games
Danny has played 1 game.

If all contestants are required to play against one another, how many game has Eric played so far?

A. 1
B. 2
C. 3
D. 4

[jieheng]

sanie:

Thank you so much! Your model is much easier to understand

Hi sanie ,

You are welcome.

Regards,

[MathIzzzFun]

Jcong:

Alan, Ben, Caleb , Danny and Eric took part in a Weiqi competition. At the moment, the number of games played is shown below:


Alan has played 4 games
Ben has played 3 games
Caleb has played 2 games
Danny has played 1 game.

If all contestants are required to play against one another, how many game has Eric played so far?

A. 1
B. 2
C. 3
D. 4

Hi

Hope this helps :lol:


http://postimage.org/image/27bw7orvo/

cheers.

[2cutis]

Hi,


We know 2 sq is 2x 2 and 2 cube is 2x2x2 but what’s the answer for 2 to the power of 50?

[Chan09]

Need some help


1) 3/5 are $50. 2/3 of the remainder are $10 and $5 notes and the rest are $2 notes. He had twenty four $2 notes. The number of $10 notes is 1/7 of the number of $5 notes. What is the number of $10 notes he has?
Ans: 4

2) the ratio of the number of Chinese pupils to the number of Malay pupils was 10:7. The ratio of the number of Malay boys to Malay girls was 9:5. What was the rato of the number of Malay girls to the number of chinese pupils in it's simplest form?
Ans: 1:2

Thank you :?

[Immasimplegirl]

Need help with this question:


5 friends were playing Wii games on a Friday afternoon from 3pm to 6pm. As there were only 4 consoles, they took turns to play. At any time, 3 of them played while the other 2 friends watched. If each of them had the same amount of playing time, how many minutes did each child play that afternoon?
Thanks:D

[sanie]

[quote=\"Chan09\"]Need some help


1) 3/5 are $50. 2/3 of the remainder are $10 and $5 notes and the rest are $2 notes. He had twenty four $2 notes. The number of $10 notes is 1/7 of the number of $5 notes. What is the number of $10 notes he has?
Ans: 4

3/5 (9/15) -> $50
2/3 of 2/5 (4/15) -> $10 & $5
(2/15) -> $2

4u = 1/7 ($10 notes)

$10 = 4 notes.

[she0407]

Need help for P5 math problem. :?


1. Mr Heng paid $45 for 7 goldfish and 6 guppies. Each goldfish cost 12 times as much as a guppy. How much more did he pay for a goldfish than a guppy?

2. Mr Lim paid $220 for 5 singlets and 5 jackets. Each jacket cost 10 times as much as a singlet. Find the price of 2 singlets and 3 jackets.

:?:


Thank you!