Question about HP 33s Calculator

Re: HP33 s

There are some examples in the manual (link below) that may help............ http://h10032.www1.hp.com/ctg/Manual/c00251639.pdf

Posted on Jul 25, 2007

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 | Calculators

Don't really know what you are looking for here, but I will give it a shot;)

comes after 8

Comes before 10

Square root is 3

Factors are 1,3, and 9

Squared is 81

9 is also an interesting number because to see if 9 goes into a number evenly, you just add up the digits of the number and see if 9 goes into that number, 9 will go into the number evenly.

For example, to see if 7871847097401 is divisible by 9, let's add up the digits.

7+8+7+1+8+4+7+0+9+7+4+0+1=63 9 goes into 63 evenly, so 0 goes into 7871847097401 evenly. When you add up the digits and get 63, you can also add 6+3 to get 9 and 9 will go into 9 evenly, so 9 goes into 7871847097401 evenly.(p.s. The same process works for the number 3).

Good luck.

Paul

comes after 8

Comes before 10

Square root is 3

Factors are 1,3, and 9

Squared is 81

9 is also an interesting number because to see if 9 goes into a number evenly, you just add up the digits of the number and see if 9 goes into that number, 9 will go into the number evenly.

For example, to see if 7871847097401 is divisible by 9, let's add up the digits.

7+8+7+1+8+4+7+0+9+7+4+0+1=63 9 goes into 63 evenly, so 0 goes into 7871847097401 evenly. When you add up the digits and get 63, you can also add 6+3 to get 9 and 9 will go into 9 evenly, so 9 goes into 7871847097401 evenly.(p.s. The same process works for the number 3).

Good luck.

Paul

Mar 30, 2015 | Calculators

Both numbers are even, so let's start by dividing by 2.

$9.08 to $8.24

Both numbers still even, divide by 2 again.

$4.54 to $4.12

Both numbers still even, divide by 2 again!

$2.27 to $2.06

One number is not even, so we don't need to divide by an even number again.

To see if 3 goes into the numbers evenly, add up the digits of the number and see if 3 goes into the total evenly. If yes, the number is divisible by 3.

2+2+7= 11, 1+1 = 2. 3 does not go evenly into 2, therefore 3 does not go evenly into $2.27.

Numbers don't end in 0 or 5, so 5, 10 and 15 do not go into them evenly.

7 does not go in evenly

To see if 9 goes into the numbers evenly, add up the digits of the number and see if 9 goes into the total evenly. If yes, the number is divisible by 9.

We added up the digits and got 11, so 9 does not go in evenly into $2.27.

See if 13 goes into the numbers evenly. No.

See if 17 goes into the numbers evenly. No.

When do we stop? 17 squared is 289, which is higher than both numbers so we can stop!

We have the number in lowest terms at $2.27 to $2.06.

Good luck.

Paul

$9.08 to $8.24

Both numbers still even, divide by 2 again.

$4.54 to $4.12

Both numbers still even, divide by 2 again!

$2.27 to $2.06

One number is not even, so we don't need to divide by an even number again.

To see if 3 goes into the numbers evenly, add up the digits of the number and see if 3 goes into the total evenly. If yes, the number is divisible by 3.

2+2+7= 11, 1+1 = 2. 3 does not go evenly into 2, therefore 3 does not go evenly into $2.27.

Numbers don't end in 0 or 5, so 5, 10 and 15 do not go into them evenly.

7 does not go in evenly

To see if 9 goes into the numbers evenly, add up the digits of the number and see if 9 goes into the total evenly. If yes, the number is divisible by 9.

We added up the digits and got 11, so 9 does not go in evenly into $2.27.

See if 13 goes into the numbers evenly. No.

See if 17 goes into the numbers evenly. No.

When do we stop? 17 squared is 289, which is higher than both numbers so we can stop!

We have the number in lowest terms at $2.27 to $2.06.

Good luck.

Paul

Mar 25, 2015 | Calculators

Let x be the smallest number.

Let x + 2 be the other number (consecutive even integer)

Now to translate the rest;)

three times the smaller 3(x)

19 more -19

sum of the two integers - (x) +( x+2)

Pulling it together,

3x -19 = x + x +2

collect like terms

3x - 19 = 2x + 2

Put all the constants on one side by adding 19 to both sides.

3x - 19 +19= 2x + 2 + 19

3x = 2x +21

Subtract 2x from both sides to have all the x's on one side.

3x - 2x = 2x +21 - 2x

x = 21

The other number is 21 + 2, or 23

Check:three times the smaller = 3 x 21 = 63

sum of the two integers = 21 + 23 or 44

is 63 at least 19 more than 44

Let x + 2 be the other number (consecutive even integer)

Now to translate the rest;)

three times the smaller 3(x)

19 more -19

sum of the two integers - (x) +( x+2)

Pulling it together,

3x -19 = x + x +2

collect like terms

3x - 19 = 2x + 2

Put all the constants on one side by adding 19 to both sides.

3x - 19 +19= 2x + 2 + 19

3x = 2x +21

Subtract 2x from both sides to have all the x's on one side.

3x - 2x = 2x +21 - 2x

x = 21

The other number is 21 + 2, or 23

Check:three times the smaller = 3 x 21 = 63

sum of the two integers = 21 + 23 or 44

is 63 at least 19 more than 44

Feb 19, 2015 | Calculators

The sum of 7 and 0 is 7. Adding zero to a number doesn't change the number.

Feb 17, 2015 | Calculators

What does that mean adding? Displaying extra zeros? If that is the case Press [2nd][.] and limit the number of decimal you want.

You can put the calculator in FLOating mode: Press 2nd DRG and choose FLO.

You can put the calculator in FLOating mode: Press 2nd DRG and choose FLO.

Apr 15, 2014 | Texas Instruments TI-30XA Calculator

Here's a simple (and inefficient) 35s program. It simply goes through a loop 25 times, adding up the numbers.

A001 LBL A

A002 25

A003 STO A

A004 0

A005 RCL+ A

A006 DSE A

A007 GTO A005

The sum of the first N positive integers can be calculated more efficiently as N(N+1)/2 .

A001 LBL A

A002 25

A003 STO A

A004 0

A005 RCL+ A

A006 DSE A

A007 GTO A005

The sum of the first N positive integers can be calculated more efficiently as N(N+1)/2 .

Mar 10, 2014 | HP 35s Programmable Scientific Calculator...

The two numbers are 32 and 34. The rest is your homework, you do it.

Dec 19, 2013 | Calculators

The selector you are asking about is the "decimal selector". The result displayed/printed, will be in a format according to the position that you have selected as follows:

f = floating (the result will be in the number of decimal places that were entered on the keyboard

4= fixed 4 decimal places (x.0000)

3= fixed 3 decimal places (x.000)

2= fixed 2 decimal places (x.00)

0= fixed 0 decimal places (x)

add 2= (add mode*,fixed 2 places) ($.00)

Note* "ad mode" automatically enters the decimal place when entering the number on the keyboard. If you enter "123", the displayed ammount will be "1.23". If you enter "1", the display will read ".01". This is a useful setting when adding a list of numbers in a dollars/cents format, however, be careful, if entering a whole dollar ammount "three dollars" be sure to enter the decimal point, or enter the number as "300". If you don't, the result will be ".03", instead of the 3 dollars you intended.

f = floating (the result will be in the number of decimal places that were entered on the keyboard

4= fixed 4 decimal places (x.0000)

3= fixed 3 decimal places (x.000)

2= fixed 2 decimal places (x.00)

0= fixed 0 decimal places (x)

add 2= (add mode*,fixed 2 places) ($.00)

Note* "ad mode" automatically enters the decimal place when entering the number on the keyboard. If you enter "123", the displayed ammount will be "1.23". If you enter "1", the display will read ".01". This is a useful setting when adding a list of numbers in a dollars/cents format, however, be careful, if entering a whole dollar ammount "three dollars" be sure to enter the decimal point, or enter the number as "300". If you don't, the result will be ".03", instead of the 3 dollars you intended.

May 20, 2011 | Royal 29307U Calculator

When you want to complete a problem on an adding machine, such as "7 - 3," you would not key in "7," then the subtraction sign, then "3" and then an equal sign. If you do, then you will get an answer of "-4," and you know that is not the correct answer. Again, you have to think like an accountant when you are working with your adding machine. To figure this subtraction problem on an adding machine, you would need to key in "7," the addition sign, "3" and then the subtraction sign; you would get the answer of 4. You are actually working the problem as "7 + (-3)." This would be true on most modern day machines. In order to subtract, you have to add the negative number.

Sep 25, 2009 | Victor 1208-2 Calculator

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