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Posted on Jan 02, 2017

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Let's take it one step at a time.

First part of the sentence uses the word sum. Sum = Addition

Later, the word product. Product = Multiplicaton

Rephrasing, we want two number that add to 20 and multiply to 51.

Let a be the first number.

Let b be the second number.

a + b = 20

a x b = 51

You either solve this in your head, by trial and error. The next step I take is to factor the a x b or 51. The factors are 1, 3, 17, and 51.

Which of these numbers add to 20? 17 and 3.

Good luck,

Paul

First part of the sentence uses the word sum. Sum = Addition

Later, the word product. Product = Multiplicaton

Rephrasing, we want two number that add to 20 and multiply to 51.

Let a be the first number.

Let b be the second number.

a + b = 20

a x b = 51

You either solve this in your head, by trial and error. The next step I take is to factor the a x b or 51. The factors are 1, 3, 17, and 51.

Which of these numbers add to 20? 17 and 3.

Good luck,

Paul

Feb 28, 2018 | Homework

-54k^2+3k
I assume that you want to factor this completely.

I do it one component at a time.

What is the biggest common factor of -54 and 3. I use a trick of adding the digits of the number. If 3 and/or 9 go into that number evenly, than 3 and/or 9, respectively go into the original number. In this case, 5+4 = 9 and since 3 goes into 9 evenly, 3 goes into 54 evenly. Since the factors of 3 are 3 and 1, this must be the greatest common factor of this component.

Onto the next component, what is the greatest common factor of k^2 and k. The answer is k, because k^2 doesn't go evenly into k.

Combining the two, the greatest common factor is 3k.

Next we have to divide 3k into each term.

3k(-18k+1) or -3k(18k-1)

Good luck,

Paul

I do it one component at a time.

What is the biggest common factor of -54 and 3. I use a trick of adding the digits of the number. If 3 and/or 9 go into that number evenly, than 3 and/or 9, respectively go into the original number. In this case, 5+4 = 9 and since 3 goes into 9 evenly, 3 goes into 54 evenly. Since the factors of 3 are 3 and 1, this must be the greatest common factor of this component.

Onto the next component, what is the greatest common factor of k^2 and k. The answer is k, because k^2 doesn't go evenly into k.

Combining the two, the greatest common factor is 3k.

Next we have to divide 3k into each term.

3k(-18k+1) or -3k(18k-1)

Good luck,

Paul

Mar 29, 2017 | Homework

I don't think you can do it! Could you check your numbers.

If we are using the numbers 1-9 once and only once in a 3x3 magic square, the sum of the rows + the sum of the columns should be 90, since 1+2+3+4+5+6+7+8+9 in the rows adds up to 45 and 1+2+3+4+5+6+7+8+9 in the columns adds up to 45.

When trying to solve, the magic number seem to be the sums 24 and 10. To get 24, the only three numbers that add to 24 are 7 + 8 +9. Similarly to get 10, the lowest numbers re 1 and 2 and the smallest big number to use is 7. I then ran out of number trying to get 21, 13 and 15 sums.

Good luck,

Paul

If we are using the numbers 1-9 once and only once in a 3x3 magic square, the sum of the rows + the sum of the columns should be 90, since 1+2+3+4+5+6+7+8+9 in the rows adds up to 45 and 1+2+3+4+5+6+7+8+9 in the columns adds up to 45.

When trying to solve, the magic number seem to be the sums 24 and 10. To get 24, the only three numbers that add to 24 are 7 + 8 +9. Similarly to get 10, the lowest numbers re 1 and 2 and the smallest big number to use is 7. I then ran out of number trying to get 21, 13 and 15 sums.

Good luck,

Paul

May 21, 2015 | Office Equipment & Supplies

450=9*5*10=9*50

9*50/3=3*50=150

To verify if a number is divisible by 3, add the digits in the number. If the sum of digits is divisible by 3, then thumber is also divisible by 3.

Sum of digits in 450 =4+5+0 =9, divisible by 3, so 450 is also divisible by 3.

9*50/3=3*50=150

To verify if a number is divisible by 3, add the digits in the number. If the sum of digits is divisible by 3, then thumber is also divisible by 3.

Sum of digits in 450 =4+5+0 =9, divisible by 3, so 450 is also divisible by 3.

Jul 06, 2014 | Office Equipment & Supplies

1

2

3

4

5

6

7

8

9

153

370

371

407

1634

8208

9474

54748

92727

93084

548834

Jan 06, 2011 | Computers & Internet

A number is 3 more than 4 the sum of its digits. If the digits are interchanged, the resulting number is 9 more than the given number. Find the number.

Aug 05, 2010 | Brookstone Luggage & Travel

hello. now you are making me think about something that i have not thought about in many years.

72 is a composite number because it has factors other than 1 and itself., It is not a prime number.

The 12**factors** of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72.

The**factor pairs** of 72 are 1 x 72, 2 x 36, 3 x 24, 4 x 18, 6 x 12, and 8 x 9.

The**proper factors** of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, and 36 or,

if the definition you are using excludes 1, they are 2, 3, 4, 6, 8, 9, 12, 18, 24, and 36. The**prime factors** of 72 are 2, 2, 2, 3, and 3.

72 is a composite number because it has factors other than 1 and itself., It is not a prime number.

The 12

The

The

if the definition you are using excludes 1, they are 2, 3, 4, 6, 8, 9, 12, 18, 24, and 36. The

Sep 09, 2009 | 2007 Ridley Auto Glide Old school

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