Tutor MathsGuru: Ask me for your burning Maths questions!

[atutor2001]

zyberk:

iFruit:

[quote=\"zyberk\"]Hi all,


Appreciate if anyone can help with the steps to achieve the answer to this math number problem. Thanks

| Y |
| 16 | 5 |
| 28 | 10 | 3 |
| 50 | 20 | 8 | 3 |

The answer given is Y=23

Thanks again.

I get the answer as 9. Left number - Right number -2 = Top number.

for example, 50-20-2 = 28; 28-10-2 =16

So, 16-5 -2 = 9.

Me get 9 too but the answer provided is 23. :? Anyone else?[/quote]The answer 23 is wrong. Looking at the pattern vertically, it is unlikely that the answer can be 23.

[Muffins]

for me the answer is 14.


50-28=22
28-16=12
So 16-2 (Every sum minus 10) = 14

[zyberk]

Thanks all for your help.


Anyone else has a different answer or solution?

Muffins:

for me the answer is 14.

50-28=22
28-16=12
So 16-2 (Every sum minus 10) = 14

[Ngserene617]

mathsguru:

Original Title: Let MathsGuru Answer Your Burning Maths Questions!


:welcome:

Dear Parents,

Are you frustrated/stuck when helping your child solve his/her Maths questions? Are you inclined to use Algebra most of the time? Do you have difficulty trying to use diagrams or other heuristic methods (that Primary School students learn) to solve?

:idea: Post your questions here and see how MathsGuru solve them to the best of her ability. Detailed solutions will be posted back in this thread.


Hi,

Need help for this Ques:

1. Adeline has $40 which is made up of fifty-cent and twenty-cent coins. There are 50 fifty-cent coins. What percentage of the number of his coins us twenty-cent coins?








So start asking and watch this space!!

Cheers :celebrate: ,
MathsGuru

P/S (Disclaimer, in case you're wondering...):
Although MathsGuru is a full-time Maths tutor, this thread is meant to be an absolutely free resource for parents (or even children) with no strings attached. Just someone who's passionate about Maths and wanna spread the fun in learning Maths with others.

[Ngserene617]

mathsguru:

Original Title: Let MathsGuru Answer Your Burning Maths Questions!


:welcome:

Dear Parents,

Are you frustrated/stuck when helping your child solve his/her Maths questions? Are you inclined to use Algebra most of the time? Do you have difficulty trying to use diagrams or other heuristic methods (that Primary School students learn) to solve?

:idea: Post your questions here and see how MathsGuru solve them to the best of her ability. Detailed solutions will be posted back in this thread.


Hi,

Need help for this Ques:

1. Adeline has $40 which is made up of fifty-cent and twenty-cent coins. There are 50 fifty-cent coins. What percentage of the number of his coins us twenty-cent coins?








So start asking and watch this space!!

Cheers :celebrate: ,
MathsGuru

P/S (Disclaimer, in case you're wondering...):
Although MathsGuru is a full-time Maths tutor, this thread is meant to be an absolutely free resource for parents (or even children) with no strings attached. Just someone who's passionate about Maths and wanna spread the fun in learning Maths with others.

[Ngserene617]

Hi,


Appreciate if anyone can help me the below ques:

1. Adeline has $40 which is made up of fifty-cent and twenty-cent coins. There are 50 fifty-cent coins. What percentage of the number of his coins us twenty-cent coins?

Thanks

mathsguru:

Original Title: Let MathsGuru Answer Your Burning Maths Questions!

:welcome:

Dear Parents,

Are you frustrated/stuck when helping your child solve his/her Maths questions? Are you inclined to use Algebra most of the time? Do you have difficulty trying to use diagrams or other heuristic methods (that Primary School students learn) to solve?

:idea: Post your questions here and see how MathsGuru solve them to the best of her ability. Detailed solutions will be posted back in this thread.

So start asking and watch this space!!

Cheers :celebrate: ,
MathsGuru

P/S (Disclaimer, in case you're wondering...):
Although MathsGuru is a full-time Maths tutor, this thread is meant to be an absolutely free resource for parents (or even children) with no strings attached. Just someone who's passionate about Maths and wanna spread the fun in learning Maths with others.

[Emelyn]

Hi,


I have 3 questions and appreciate some help here.

1. Daniel’s savings was 75% as much as Annabel. After annabel saved another $40 and Daniel saved another $20, Daniel’s savings became 5/8 as much as Annabel’s savings. Find Daniel’s savings at first.

2. A box contained some square and round cookies. 40% of these cookies are round. After removing 55 squares and 10 round cookies, the number of square cookies became 70% as many as the number of round cookies. How many cookies were there in the box at first ?

3. On a bus, there were 20% as many children as adults. After 28 adults alighted from the bus, the percentage of children increased to 40%. How many children were there in the bus?

MTIA.

[iFruit]

Emelyn:

Hi,


I have 3 questions and appreciate some help here.

1. Daniel's savings was 75% as much as Annabel. After annabel saved another $40 and Daniel saved another $20, Daniel's savings became 5/8 as much as Annabel's savings. Find Daniel's savings at first.

2. A box contained some square and round cookies. 40% of these cookies are round. After removing 55 squares and 10 round cookies, the number of square cookies became 70% as many as the number of round cookies. How many cookies were there in the box at first ?

3. On a bus, there were 20% as many children as adults. After 28 adults alighted from the bus, the percentage of children increased to 40%. How many children were there in the bus?

MTIA.

1)
Annabel = 4u
Daniel = 3u

After more savings,
Annabel = 4u + 40
Daniel = 3u +20

(3u+20)/(4u+40) = 5/8

24u+160 = 20u+200
4u = 40

Daniel = 3u = 30

The other problems are very similar.

[iFruit]

Ngserene617:

Hi,


Appreciate if anyone can help me the below ques:

1. Adeline has $40 which is made up of fifty-cent and twenty-cent coins. There are 50 fifty-cent coins. What percentage of the number of his coins us twenty-cent coins?

Thanks

Hi Ngserene617,

We just need to list down the facts given.

Total money Adeline has = $40
fifty cent coins = 50
Value of fifty cent coins = 0.50 * 50 = $25

amount of money in twenty cent coins = $40 - $25 = $15
Number of twenty cent coins = $15/0.2 = 1500cents/20cents = 75

Total number of coins = 75+50 = 125

% of twenty cent coins = 75/125 *100 = 60%

Hope this helps.

[Brenda10]

Emelyn:

Hi,


I have 3 questions and appreciate some help here.

1. Daniel's savings was 75% as much as Annabel. After annabel saved another $40 and Daniel saved another $20, Daniel's savings became 5/8 as much as Annabel's savings. Find Daniel's savings at first.

2. A box contained some square and round cookies. 40% of these cookies are round. After removing 55 squares and 10 round cookies, the number of square cookies became 70% as many as the number of round cookies. How many cookies were there in the box at first ?

3. On a bus, there were 20% as many children as adults. After 28 adults alighted from the bus, the percentage of children increased to 40%. How many children were there in the bus?

MTIA.

DD working:

Q1.
D:A
3:4
+20 +40
5:8

24U =160
20U =200
------------
4u = 40
1u = 10

Daniel saving at first: 3u x 10= $30

Q2.
S:Q
3:2 (Before)
-55 - 10
7:10 (After)

30u 550
14u 70
---------
16u 480
1u = 30

Cookie at first 5u x 30 = 150

Q3.

C:A
1:5 (at First)
-28 (28 audlts alighted)
2:3 (after)

2:10 (at first x 2 since no changes in children)
2:3
--------
7u = 28
1u = 4

As such, children 2u x 4 = 8

Thank you.