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HP33 s I have changed the mode on my HP33s Algerbraic. It seems that i can only add about 7 numbers consecutively before it stops adding. How can i change the settings so I can just continuosly add as many numbers as i like.

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Re: HP33 s

There are some examples in the manual (link below) that may help............

Posted on Jul 25, 2007

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I'm trying to figure out a 3x3 magic square where the rows equal 21 18 10 and the columns equal 15 24 13 using the numbers 1-9

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,


May 21, 2015 | Calculators

2 Answers

Whats signifecent about number nine

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.


Mar 30, 2015 | Calculators

1 Answer

Write this ratio as fraction in lowest terms.

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.


Mar 25, 2015 | Calculators

1 Answer

Find the smallest two consecutive even integers such that three times the smaller is at least 19 more than the sum of the two integers

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

Feb 19, 2015 | Calculators

1 Answer

What is the sum of 7 and 0?

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

Feb 17, 2015 | Calculators

1 Answer

Adding 0

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.

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

1 Answer

Sum of consecutive positive integers

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 .

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

1 Answer

Consecutive even integers

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

Dec 19, 2013 | Calculators

1 Answer

What is the default setting for the f cut 5/4 and the 4320 add 2 I don't know what to have these options set at thanks EW Seattle

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.

May 20, 2011 | Royal 29307U Calculator

1 Answer

I can't seem to do simple subtraction with my Victor 1208-2. When I subtract say 5-4, I get a negative 9. Is there a setting or do I need to press something different to get simple subtraction to work?

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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