yup, Rahim has 252 at first. 36 is a wrong answer.Daddy D wrote:Noted, thanks both.

So Rahim should have 252 at first instead of 36?

## Q&A - P5 Math

### Re: Q&A - P5 Math

### Re: Q&A - P5 Math

Hi all, can anyone help in providing the working backwards calculation for the above question? Tks again!jo-jed wrote:Pls help.

Each of the three pails A,B and C contains some water.The following steps are taken:

Step (1):1/4 of the water in Pail A is pored into Pail B

Step (2):1/4 of the water in Pail B is pored into Pail C

Step (3):1/4 of the water in Pail C is pored into Pail A

In the end,all the pails contain 18 liters of water each.Find the amount of water in each Pail at first.

- Nebbermind
- KiasuGrandMaster
**Posts:**16444**Joined:**Tue Dec 22,**Total Likes:**164

### Re: Q&A - P5 Math

After (3) C is left with 3/4. Or 18L.Nickal wrote:Hi all, can anyone help in providing the working backwards calculation for the above question? Tks again!jo-jed wrote:Pls help.

Each of the three pails A,B and C contains some water.The following steps are taken:

Step (1):1/4 of the water in Pail A is pored into Pail B

Step (2):1/4 of the water in Pail B is pored into Pail C

Step (3):1/4 of the water in Pail C is pored into Pail A

In the end,all the pails contain 18 liters of water each.Find the amount of water in each Pail at first.

Therefore 6L went into A...and A had 12L after pouring into B. Therefore A had 16L before pouring into B.

After (2), B had 18L n C had 24L...so B had 24L and C had 18L before (2)

From above we know at (1), 4L was poured into B. Therefore B had 20L.

Originally,

A 16L

B 20L

C 18L

### Re: Q&A - P5 Math

hi, need help, this sum seems confusion t me

thks!

ken bought some packet of stamps. there are 8 stamps in each packet. ken was given another 4 more stamps by his brother. and he repacked all the stamps into smaller packet. there are now exactly 6 stamps in each packet and 22 more packet than before. how many stamps did he buy?

thks!

ken bought some packet of stamps. there are 8 stamps in each packet. ken was given another 4 more stamps by his brother. and he repacked all the stamps into smaller packet. there are now exactly 6 stamps in each packet and 22 more packet than before. how many stamps did he buy?

### Re: Q&A - P5 Math

22 more packets = 22*6 = 132 stampschloecube wrote:hi, need help, this sum seems confusion t me

thks!

ken bought some packet of stamps. there are 8 stamps in each packet. ken was given another 4 more stamps by his brother. and he repacked all the stamps into smaller packet. there are now exactly 6 stamps in each packet and 22 more packet than before. how many stamps did he buy?

(132 stamps were used to pack the extra 22 packets).

132 - 4 = 128 stamps

(128 stamps is the number of stamps that were taken out from the original packets which have 8 each)

8 - 6 = 2 stamps

Imagine each packet, ken took out 2 stamps for repacking.

And a total of 128 stamps were taken out from the original packets.

Therefore,

128/2 = 64 packs

(Ken has 64 packs at the start.)

Total stamps he bought = 64 * 8 = 512 stamps.

**FOR CHECKING**

512/8 = 64 packs

512+4=516

516/6 = 86 packs

86 - 64 = 22 packs extra

### Re: Q&A - P5 Math

Pictorial Representation:chloecube wrote:hi, need help, this sum seems confusion t me

thks!

ken bought some packet of stamps. there are 8 stamps in each packet. ken was given another 4 more stamps by his brother. and he repacked all the stamps into smaller packet. there are now exactly 6 stamps in each packet and 22 more packet than before. how many stamps did he buy?

### Re: Q&A - P5 Math

good morning,

sorry I need another help on this sum.

I am thinking of a fraction

the difference between numerator and the denominator is 23.

when 5 is added to the denominator, the fraction becomes 1/5

what is the fraction?

thank you!

sorry I need another help on this sum.

I am thinking of a fraction

the difference between numerator and the denominator is 23.

when 5 is added to the denominator, the fraction becomes 1/5

what is the fraction?

thank you!

- Nebbermind
- KiasuGrandMaster
**Posts:**16444**Joined:**Tue Dec 22,**Total Likes:**164

### Re: Q&A - P5 Math

Use model.chloecube wrote:good morning,

sorry I need another help on this sum.

I am thinking of a fraction

the difference between numerator and the denominator is 23.

when 5 is added to the denominator, the fraction becomes 1/5

what is the fraction?

thank you!

Num = N

Den = N + 23

After, Den = N + 23 + 5

Theregore, 23+5 = 4N

N = 7

Fraction is 7/30