Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Hi staft mj here i miss 97 isthe prime number between 90-97 ok am i right? Send mea message & let me know? What do u think i should do now then? Send message back niw please?

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,872

Yes, 97 is the only prime between 90 and 100.

Look at post 300.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Hi bob bundy do u what a copy of the work in question 300 or not? If not what do u what meto do so i can send it to u then? Sendmessage now please?

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,872

hi Mandy,

I think you can check it yourself.

Only the prime numbers should be left un-shaded.

In post #298 you had a list of primes that you found using the prime tool.

Are the two lists the same?

If not, why not?

Look carefully at any number that is only in one list.

Either it should be in both or in neither.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Hi bob bundy mandy i have sent you at e-mail to read ok like now? Then get back tome!

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Hi noman75 mandy jane here. Just wondered how old u r? & why u r doing this course? Where do u live? Send me a message right now if u can please it would beg good?

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 93,776

Hi mandy jane;

How are you? Everything okay?

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Hi bobbym sorry it has been a long time sending u a message but i have been busny with maths and i am finding it hard to do? the weather here is wet and windy? what is the weather like over there? send message now please?

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 93,776

Hot! Hot! Hot!

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Hi bob bundy sorry it has been a whilll but busny with work at the moment. I have look at 254, 258, 261, 266 and they have help me out thank's for that. I will triy and answer a bit sooner to you ok? but I am finding the course a bit hard but when I get stuck I will send you a messsage ok? send message to me now?

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,872

hi Mandy

I do understand that you are busy and that you are finding the maths difficult.

But people on this forum will help you and that will save you time and make the work less difficult.

Post 254. What answers did you get?

Post 300. You have two lists of primes up to 97. Are they the same? If not, what are the differences?

Post 269. What answers have you now got for questions 1 and 2 ?

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Hi bob bundy i will send answers to night as on my way to work? Do u know norman75 or not? Send message now please?

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,872

norman75 ?

No. Did he make a post about your course?

He is not a member, so he must have used a guest post.

And that post has now been deleted so I cannot track him down.

Bob

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Hi bob bundy i will send the answers to u this afternoon by 2.00pm ok? Hope that is ok with u? i whish there were people i could talk to how were doing the same course as me? Do u know of anyone? Send me message & let me know?

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,872

No, I don't know anyone.

Two suggestions:

(i) look on the course website and see if they have a forum / discussion area

(ii) ask your tutor.

Bob

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Hi bob bundy mandy here the answers to 269 is the next red numbers are 25 and 29 can you help me with quistion 254 and 300 then please? send message back as soon as you can?

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,872

hi Mandy,

Well done! The red numbers are 25 and 29.

But that doesn't finish the question in the assignment.

The black numbers make the sequence 3, 8, 17, 30, 47, 68, ??, ??

The red numbers are the differences

8 - 3 = 5

17 - 8 = 9

30 - 17 = 13

47 - 30 = 17

68 - 47 = 21

So now you know that 25 and 29 are the next differences, you have to work out the next two black numbers after 68.

**So is question (1) complete?**

(1) odd numbers This is done.

(2) prime numbersThis still needs to be done.

(3) multiples of 2 This is done.(b) Look at the six numbers above again. The difference between the first and second number is 5,between the second and third 9,and between the third and fourth is 13.

(1) Work out the difference between the fourth and fifth. This is done.

(2) between the fifth and sixth. This is done.(c) Use the above results to work out the seventh and eighth numbers in the series.

This still needs to be done.(d) Write down an explanation as to how you found these numbers.

This still needs to be done.(e) Use a similar method to find the next two numbers in the following pattern:

1,4,14,31,55,86

This still needs to be done.

**Then there are bits of question (2) to do.**

Question 2

Use your calculator to fined the values of:

(a) 0.1615 x 0.34 This is done.

(b) 0.001615 * 0.034 This is done.

(c) 28.243 *2.6 to 2 dec. places

The rounding still needs to be done.(d) 0.25 * 4.5 to 2 sig. figures

The rounding still needs to be done.

Now for the fractions in post #254.

You should have a** large set of flashcards** that I made for you during April.

Every answer that you need for this question is one for which you have a flashcard. I deliberately only set questions for which I had already made you the card, so if you have got the cards in front of you this question should be easy. Some of the answers were also set in earlier posts, so it may just be a case of reviewing what you have already done.

**Post #300.**

You have already found your own list of primes in post #298.

The task in post #300 was to find the primes by shading out all the numbers that are not primes. Did you do this?

I have found this You Tube video that does this task.

http://www.youtube.com/watch?v=9m2cdWorIq8

It is just a case of comparing the two answers to make sure they are the same.

So, are they the same?

Bob

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Hi bob bundy Mandy here I have done some of the question (B) 93,122 next two black numbers (C) the sevth number is 25 the eighth number 29 (D) sixyeigh add on till you get 93 is 25 and 93 add on till you get 122 is 29 (E) 1,4,14,31,55,86 the next two number I triyed and triyed but couldn't do it? Question 2 c & d did't under stand what 2dec places are or 2 sig figures are? post 254 still to do and post 300 yes they are? can you tell me which ones are right or not please? send message back now please?

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,872

hi Mandy

93 and 122 are both correct.

The next sequence follows exactly the same pattern.

I've made a picture below to show you the differences.

While I look at the rest of your post, see if you can do this sequence.

Bob

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,872

Did you look at

http://www.mathsisfun.com/rounding-numbers.html

This tells you all about rounding numbers. Have a **proper** look at it and then either post the answers or tell me which bits you don't understand.

I'll check tomorrow morning to see how you are doing with the sequence and rounding.

Bob

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

is the answer to the last question 124 and 169 or not? send message now?

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,872

Yes, those two answers are both correct, well done.

Bob

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Did i get any of the others right or not? Send message now please?

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,872

Not sure what you mean. All you have posted is correct.

So now you need to do what's left from post #317

Bob

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,126

Hi bob bundy mandy here the answer to (C) is 28.243*2.6 to dec places is 1176.26 and (D) is 0.25 * 4.5 to 2 sig figures is 005.55555 am I right or not? if not show me how to do them please? send message now please?

Offline