Q&A - P5 Math

[tianzhu]

ariasnow:

Another question.


Tom was reading a book. He read 1/8 of it on the first day, 1/5 of it on the 2nd day and 1/4 of it on the 3rd day. After that, he still had 68 pages to read. How many pages does the book have?

Hi

Good Morning.

A common multiple of 4, 5 and 8 is 40.

First day ------- 5 units (1/5 of 40)
Second day ------- 8 units
Third day ------- 10 units

40 – 23 ------ 17

17 units ------ 68
1 unit ------ 4

Number of pages ------- 40*4 ------- 160

Best wishes

[tianzhu]

ariasnow:

Need help on this. thanks.


Ali, Bala and Charles shared a sum of $. Ali recieved 1/3 of the amt that Bala and Charles recieved altogether. The amt Bala recieved is 1/2 of the total amt that Ali and Charles recieved. If Charles recieved $110, find the total amt that Ali and Bala recieved altogether.

Hi

Ali : (Bala + Charles) ------- 1:3 (Total 4 unit)
(x3)
Ali : (Bala + Charles) ------- 3:9 (Total 12 unit)

Bala : (Ali + Charles) ------ 1:2 (Total 3 units)
(x4)
Bala : (Ali + Charles) ------ 4:8 (Total 12 units)

Make the total units the same.

Ali ------ 3 units
Bala ------- 4 units
Charles ------- 5 units

5 units ------ 110
1 unit ------- 22

(Ali + Bala) ------- 7 units ------- 7*22 ------- 154

Best wishes

[ariasnow]

ariasnow:

Another question:


Sam had 20 more cards than Tony. During a game, Tony lost 14 of his cards to Sam. In the end, Sam had 4 times the number of cards that Tony had. How many cards did Sam have at first?

help needed on this. thks.

[ariasnow]

ariasnow:

Need help on this. thanks.


Ali, Bala and Charles shared a sum of $. Ali recieved 1/3 of the amt that Bala and Charles recieved altogether. The amt Bala recieved is 1/2 of the total amt that Ali and Charles recieved. If Charles recieved $110, find the total amt that Ali and Bala recieved altogether.

help needed with thks!

[ariasnow]

ariasnow:

Need help:


At a party, 6/11 of the people were children while 5/7 of the adults were women. There were 3 times as many boys as girls and 60 more women than men. After that, 14 men and 7 women left the party.

a) How many ppl were there at the party in the beginning?
b)How many of the people at the party in the end were male?

help needed.thks!

[ariasnow]

ariasnow:

ariasnow:

Need help on this. thanks.


Ali, Bala and Charles shared a sum of $. Ali recieved 1/3 of the amt that Bala and Charles recieved altogether. The amt Bala recieved is 1/2 of the total amt that Ali and Charles recieved. If Charles recieved $110, find the total amt that Ali and Bala recieved altogether.

solved. thks.

[MathIzzzFun]

ariasnow:

ariasnow:

Need help:


At a party, 6/11 of the people were children while 5/7 of the adults were women. There were 3 times as many boys as girls and 60 more women than men. After that, 14 men and 7 women left the party.

a) How many ppl were there at the party in the beginning?
b)How many of the people at the party in the end were male?

help needed.thks!

Hi
number of people --> 77 units
number of children --> 42 units
number of adults --> 35 units
number of women --> 25 units
number of men --> 10 units
number of boys --> 3/4 x 42 units = 31.5 units
males --> 10 units + 31.5 units = 41.5 units

25 units - 10 units = 15 units --> 60, 1unit = 4

Total number people, at first = 77 x 4 = 308
Total number of males, at first = 41.5 x 4 = 166
Total number of males, in the end = 166 - 14 = 152

cheers.

[MathIzzzFun]

ariasnow:

ariasnow:

Another question:


Sam had 20 more cards than Tony. During a game, Tony lost 14 of his cards to Sam. In the end, Sam had 4 times the number of cards that Tony had. How many cards did Sam have at first?

help needed on this. thks.

Hi

At first,
Tony --> 1 unit
Sam --> 1 unit + 20

Tony lost 14 cards to Sam :
Tony --> 1 unit - 14
Sam --> 1 unit + 34

1 unit + 34 = 4 (1 unit - 14) = 4 units - 56
3 units = 90, 1 unit = 30
1 unit + 20 = 50
Sam had 50 cards at first.

cheers.

[lawyerteachertutors]

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[tianzhu]

Hi Xiao Hu


I took another look at the overlapping question.

The length of the rectangle is 16cm (same as before).

The area of the shaded area is 24 sq cm (same as before).

Total area of the unshaded area is 212 sq cm (different).

To avoid confusion, I’ve removed all my earlier posts on this question.

Best wishes