Q&A - P4 Math

[cmm]

Thank you, thank you, tianzhu for coming to my rescue again!


This question was given by my girl’s class math teacher to the class. How about the same question, now 5 x 5?

Thanks lots!!!

[tianzhu]

cmm:

Thank you, thank you, tianzhu for coming to my rescue again!


This question was given by my girl's class math teacher to the class. How about the same question, now 5 x 5?

Thanks lots!!!

Hi

1--24--17--15--8
14--7--5--23--16
22--20--13--6--4
10--3--21--19--12
18--11--9--2--25

The numbers add up to 65.

Ok, no more brain teasers, time to watch tv already.

Best wishes

[cmm]

:thankyou:

[chloecube]

Thank you everyone.

[ppnadh]

1) Devi has a bale of cloth measuring 96m. She used 1/3 of the cloth on saturday and 1/4 of the same cloth on sunday. How much cloth did she use on both days?


The answer is 56m. Can somebody explain this to me.

2)Tan bought a sack of rice on monday and cooked 1 1/2kg of the rice everyday. By sunday, he was 1/2kg short of rice. On which day did she cook 3/5 of the rice in the sack?

The answer is "On Thurday". I dont know to solve it. Pl help me.

[Champion]

ppnadh:

1) Devi has a bale of cloth measuring 96m. She used 1/3 of the cloth on saturday and 1/4 of the same cloth on sunday. How much cloth did she use on both days?


The answer is 56m. Can somebody explain this to me.

1/3 + 1/4 = 3/12 + 4/12 = 7/12
7/12 x 96m = 56M

[Lucky Dad]

ppnadh:

2)Tan bought a sack of rice on monday and cooked 1 1/2kg of the rice everyday. By sunday, he was 1/2kg short of rice. On which day did she cook 3/5 of the rice in the sack?

The answer is \"On Thurday\". I dont know to solve it. Pl help me.

Ans: Daily use 1.1/2 kg per day from Monday to Sunday

!__!__!__!__!__!__!__!
M T W T F SA SU
For total 7 Days usgae = 1.1/2 x 7 = 21/2 = 10.1/2 kg
with short of 1/2 kg the actual total = 10 kg,
to use 3/5 of 10 kg = 3/5 x 10 = 30/5 = 6 kg,
Numbers of days for 6 kg = 6 / (1.1/2) = 6 x 2/3 = 4 days,
4 days = \"on Thursday\".

[BigDevil]

ppnadh:

2)Tan bought a sack of rice on monday and cooked 1 1/2kg of the rice everyday. By sunday, he was 1/2kg short of rice. On which day did she cook 3/5 of the rice in the sack?

The answer is \"On Thurday\". I dont know to solve it. Pl help me.

Monday to Sunday --> 7 days
(1.5 x 7) - 0.5 = 10kg sack of rice.

3/5 x 10kg = 6kg

Number of days to consume 6kg = 6 / 1.5 = 4.
Hence, Thursday (4 days from Monday).

[ppnadh]

1) 3/8+3/8+3/8+3/8 = ____ * 3/8+3/8.


Pl explain me how to do this…

2) There were 245 comic books on sale at a book fair. James sold 3/5 of the books and packed the remaining books into sets of 6. How many sets of comic books did he manage to pack?

The answer is 98. But pl explain in detail how to derive it.

Thanks in advance.

[blessed777]

ppnadh:

1) 3/8+3/8+3/8+3/8 = ____ * 3/8+3/8.


Pl explain me how to do this.....

2) There were 245 comic books on sale at a book fair. James sold 3/5 of the books and packed the remaining books into sets of 6. How many sets of comic books did he manage to pack?

The answer is 98. But pl explain in detail how to derive it.

Thanks in advance.

1. There are 4 of 3/8 so. 3 x 3/8 + 3/8

2. The remaining books : 2/5 x 245= 98
pack into sets of 6 : 98 : 6 = 16 sets with 2 remaing book

Hth