Q&A - P3 Math

[teh_oh]

I am a 4-digit number.

The digit in the thousands place makes 5 when added to 2.
The digit in the hundreds place stands for 400.
The digit in the tens place is the same as the digit in the thousands place.
The digit in the ones place is the smallest possible digit.

What number am I?

Child's answer is 3431. Answer key is 3430.

Question 1: Is 'zero' consider a digit?

Question 2: Hypothetically, if the last statement is rephrase as 'The digit in the ones place has the smallest possible value', will it be 'one' or 'zero'?

TIA.

[I_belive]

teh_oh:

I am a 4-digit number.

The digit in the thousands place makes 5 when added to 2.
The digit in the hundreds place stands for 400.
The digit in the tens place is the same as the digit in the thousands place.
The digit in the ones place is the smallest possible digit.

What number am I?

Child's answer is 3431. Answer key is 3430.

Question 1: Is 'zero' consider a digit?

Question 2: Hypothetically, if the last statement is rephrase as 'The digit in the ones place has the smallest possible value', will it be 'one' or 'zero'?

TIA.

I like this question, and searched on the web for this, I found this
on http://mathforum.org/library/drmath/view/58734.html

So the answer key is correct.

Is Zero a Digit?

Date: 9/3/95 at 21:4:6
From: Anonymous
Subject: Zero??

Hello again!

New question...is zero considered a digit? I think so, but there has
been much discussion in my class!

I certainly do appreciate all your help!

Thanks


--------------------------------------------------------------------------------


Date: 9/4/95 at 11:51:22
From: Doctor Ken
Subject: Re: Zero??

Hello!

Yes, zero is a digit. It's a really really important digit! A digit is
anything that you can write down in your expression of a number in
regular notation. So since zero shows up in numbers like 307, and 10,
and even 0, zero is a digit.

-Doctor Ken, The Geometry Forum

[teh_oh]

I_belive:

teh_oh:

I am a 4-digit number.

The digit in the thousands place makes 5 when added to 2.
The digit in the hundreds place stands for 400.
The digit in the tens place is the same as the digit in the thousands place.
The digit in the ones place is the smallest possible digit.

What number am I?

Child's answer is 3431. Answer key is 3430.

Question 1: Is 'zero' consider a digit?

Question 2: Hypothetically, if the last statement is rephrase as 'The digit in the ones place has the smallest possible value', will it be 'one' or 'zero'?

TIA.

I like this question, and searched on the web for this, I found this
on http://mathforum.org/library/drmath/view/58734.html

So the answer key is correct.

Is Zero a Digit?

Date: 9/3/95 at 21:4:6
From: Anonymous
Subject: Zero??

Hello again!

New question...is zero considered a digit? I think so, but there has
been much discussion in my class!

I certainly do appreciate all your help!

Thanks


--------------------------------------------------------------------------------


Date: 9/4/95 at 11:51:22
From: Doctor Ken
Subject: Re: Zero??

Hello!

Yes, zero is a digit. It's a really really important digit! A digit is
anything that you can write down in your expression of a number in
regular notation. So since zero shows up in numbers like 307, and 10,
and even 0, zero is a digit.

-Doctor Ken, The Geometry Forum

:thankyou:

[peggy]

yeonee:

Hi, I have one question:-


John had 4 times as much money as Jessie. After John received$240 and Jessie received $180, John now has twice as much money as Jessie. How much did they have altogether at first?

Hi,

Can someone help the above qtn using model ??

many thanks.....

[Tang]

peggy:

yeonee:

Hi, I have one question:-


John had 4 times as much money as Jessie. After John received$240 and Jessie received $180, John now has twice as much money as Jessie. How much did they have altogether at first?

Hi,

Can someone help the above qtn using model ??

many thanks.....

Hi,

Jo [][][][]
Je []


Jo [][][][][-$240-] = [][$180][][$180]
Je [][$180]

2 u + 240 --> 180 x 2
2 u --> 120
1u --> 120/2 = 60

5 u --> 5 x 60 = $300

They had altogether $300 at first.

[peggy]

Hi,


Got it! Many thanks…

[tianzhu]

Hi


I’ve a request via PM for a MD solution to this question.

Here’s my solution, hope this helps.

I’ve specially selected a golden background; hope 2011 will bring golden luck to all members of KSP.

Have a golden start to a happy, prosperous and healthy new year.

Best wishes

PS --- I've included more steps to show the flow of events.You may consolidate some of the steps as you become more familiar with MD.

http://farm6.static.flickr.com/5128/5310638207_4e1aa476da_b.jpg\">

[chokos]

Harry Had 289 more stamps than Dominic.

When Dominic gave away 161 of his stamps, he had half of what Harry had.
How many stamps did Dominic have at the beginning?

Pls help solving it using model.
Thanks!

[peterch]

I try to answer as follow

http://postimage.org/image/1anz63imc/

[plum-cake]

statement 1. Harry= domi+289

statement 2. Harry/2= domi-169

statement 1- statement 2 ie

(Harry - Harry/2 )= (domi-domi) + (289 - -169)
1/2 Harry = 458
Harry = 916

Statement 1 - 916 = domi + 289
therefore 916 - 289 = domi
627 = domi

I am not sure about the model