Thks tianzu!

tianzhu:

kkme:

1) Tom's present age is thrice Sally's age some years ago. Conversely, Sally's present age is Tom's age the same number of years ago. Given that the sum of their present ages is 30 years, how old is Tom now?

Hi

For Q1, you may use MD or Units and Parts.

Due to time constraints, I’ll skip the MD this time.

At present
Tom ----- 3 units
Sally ----- 1 part

Some years ago
Tom ----- 1 part
Sally ----- 1 unit

The difference in age between two people remains the same.

3 units – 1 part ----- 1 part – 1 unit

4 units ----- 2 parts
2 units ----- 1 part

The sum of their present ages is 30 years.

3 units + 2 units ----- 30
5 units ----- 30
1 unit ----- 6

Tom ----- 3 units ----- 18

Best wishes

Thks Tianzu!

tianzhu:

kkme:

2) When Kok Hwa's age was twice Bala's age, Mike's age was 30. When Mike's age was twice Kok Hwa's age, Bala was 21. Given that Mike was the oldest among the three persons, find Bala's age when Mike was 62 years old.

Hi

For Q2, due to time constraints, I'll provide some pointers instead of drawing MD.

Case 1
Bala ----- 1 unit
KH ----- 2 units
Mike ------ 30

Difference in age between KH and Bala ----- 1 unit

Difference in age between Mike and KH ----- 30 – 2 units

Case 2
Bala ----- 21
KH ----- 21 + 1 unit
Mike ------ (21 + 1 unit) + (21 + 1 unit)
Difference in age between Mike and KH ----- 21 + 1 unit

Difference in age between two people remains the same.

30 – 2 units ----- 21 + 1 unit

3 units ----- 9
1 unit ----- 3

When Mike’s age was 30, Bala was 3 years old.

62 – 30 ------ 32

Therefore , Bala ----- 3 + 32 ------ 35 years old.

Best wishes

Hi MathIzzzFun,


Thanks for your reply.

OMG, I still dont get it.

MathIzzzFun:

kkme:

Hi, need help for these two qns.

1) Tom's present age is thrice Sally's age some years ago. Conversely, Sally's present age is Tom's age the same number of years ago. Given that the sum of their present ages is 30 years, how old is Tom now?

2) When Kok Hwa's age was twice Bala's age, Mike's age was 30. When Mike's age was twice Kok Hwa's age, Bala was 21. Given that Mike was the oldest among the three persons, find Bala's age when Mike was 62 years old.

Thanks in advance and Happy CNY!

Hi

MD for Q2 which is same as this question that was discussed some time ago - http://www.flickr.com/photos/62167097@N02/5679985631/in/photostream

cheers.

Hi, need help for these two qns.


1) Tom’s present age is thrice Sally’s age some years ago. Conversely, Sally’s present age is Tom’s age the same number of years ago. Given that the sum of their present ages is 30 years, how old is Tom now?

2) When Kok Hwa’s age was twice Bala’s age, Mike’s age was 30. When Mike’s age was twice Kok Hwa’s age, Bala was 21. Given that Mike was the oldest among the three persons, find Bala’s age when Mike was 62 years old.

Thanks in advance and Happy CNY!

Hi,


I am a FTWM with 2 boys, age 5 n 8.

Hope to see lots of advices in this forum.

Hi,


Don't know need to report here first. :oops:

Hi,


Thks to all mums that had replied. Really appreciated. I don't know that it can be so cold that have to wear 4 layers on top! In that case how many suitcase we have to bring along for 2 adults and 2 kids??

:?

[Moderator's note: Topics merged.]


Hi,

We are going to Australia (by tour group) this coiming June holiday for 7D 6N with my two kids age 4+ and 7+. May I know what are the things that I should take note of as this is the time travelling oversea?

We are going to goldcoast, movie world, dream world, feed dolphin ,etc.

I think there will be a 1 day free n easy. Is there any where that we should not miss out and can go on that free n easy day?

Thks in advance.