Q&A - P3 Math

[jesschan]

Just realised that my friend had not locked out of her ID from my laptop the last time she used it, was wondering how come my name became worried mummy... :?


coming back to this \"maths language\" issue, this teacher is the \"not easy to talk to type\" so I will just leave the matter as it is, but told my son to clarify with the teacher next time if there is ambiguity in the question

[kiasiparent]

Count the number of ‘F’ in the following text:

FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS.


How many ‘F’ did you find?

[Rosie]

6 "F"s?

[corneyAmber]

Rosie:

6 \"F\"s?

I also see 6Fs...I thought counting Es more challenging? or are there other tricks in the question? :?

[kiasiparent]

No trick. I think that question came out in the maths competition on sat. 4 marks giveaway.

[Daddy]

[Moderator's note: Topics merged.]


Hi,

I am crazy about my daughter math. Very difficult to solve. Please help :?:

Q: How many sticks does she need for the eighth pattern? If Doreen uses 2350 sticks, which pattern number will she form?

pattern 1= 5 sticks
pattern 2= 10 sticks
pattern 3= 15 sticks.

sorry, i cannot show the patterns. It was squeeze up

Thanks alot...

Daddy,...

[tianzhu]

Daddy:

Hi,


I am crazy about my daughter math. Very difficult to solve. Please help :?:

Q: How many sticks does she need for the eighth pattern? If Doreen uses 2350 sticks, which pattern number will she form?

pattern 1= 5 sticks
pattern 2= 10 sticks
pattern 3= 15 sticks.

sorry, i cannot show the patterns. It was squeeze up

Thanks alot...

Daddy,...

Hi,
2350/5 --> pattern 470.
Hope the answer is correct.

[corneyAmber]

tianzhu:

Daddy:

Hi,


I am crazy about my daughter math. Very difficult to solve. Please help :?:

Q: How many sticks does she need for the eighth pattern? If Doreen uses 2350 sticks, which pattern number will she form?

pattern 1= 5 sticks
pattern 2= 10 sticks
pattern 3= 15 sticks.

sorry, i cannot show the patterns. It was squeeze up

Thanks alot...

Daddy,...

Hi, an increase in 1 pattern --> increase of 5 sticks
2350/5 --> pattern 470.

Also, pattern 8th will be 40 sticks. (8*5)

[Daddy]

Hi,


Thanks. For your input. But the answers are wrong. The correct anwers are 180 sticks for the first question. pattern 30 on the 2nd question.

for 1st question, i did it one by one:
pattern: 1 2 3 4 5 6 7 8
Sticks: 5 10 15 20 25 30 35 40
Total sticks = 5+10+15+20+25+30+35+40 = 180 sticks.

for Q2: I knew it is pattern 30. I found it from the web. But it did not show out it got it.

Please help. Thanks...

DAddy..

[tianzhu]

Daddy:

Hi,

Thanks. For your input. But the answers are wrong. The correct anwers are 180 sticks for the first question. pattern 30 on the 2nd question.

for 1st question, i did it one by one:
pattern: 1 2 3 4 5 6 7 8
Sticks: 5 10 15 20 25 30 35 40
Total sticks = 5+10+15+20+25+30+35+40 = 180 sticks.

for Q2: I knew it is pattern 30. I found it from the web. But it did not show out it got it.

Hi
Let's us look at the question again.
How many sticks does she need for the eighth pattern?

Does it refer to the number of sticks for the eighth term or the sum of sticks from the first term to the eighth term?From your answer, the latter is more likely.

Every increase in 1 pattern---increase in 5 sticks
Number of sticks---5n, where n is the pattern number.
The number of sticks refers to the total number of sticks from the first term to the nth term, not the number of sticks for the nth term.
The sum is n(5+5n)/2, where n is the term number

To test, consider pattern 1 to 3, the sum is (5+10+15)---30
3(5+15)/2---30
For the sum of sticks from the first pattern to the 4th pattern, we have 4(5+20)/2---50.

For part 1 of the question,from the 1st term to the 8th term,
The total number of sticks---8(5+40)/2---180 sticks.

For part 2, the sum should be 2325 instead of 2350, if the pattern number is 30.

I hope I am leading you to the right path.

btw[quote]I knew it is pattern 30. I found it from the web. But it did not show out it got it. [/quote]It'll be helpful if you could provide the link to this website.Other members may be able to help.