# Do you know of any math problems that equal 9?

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Since today was 9/9/09… my math teacher wanted us to find problems that equal nine.

ex: 65*9 =585

5+8+5= 18

1+8=9

• There is an infinite amount of combinations to equal any number.

• 2+3+4=9

• 3 X 3 =9

• How about the super basic one:

1 * 9 = 9

2 * 9 = 18 (1+8 = 9)

3 * 9 = 27 (2+7 = 9)

…and so on.

• 2+5+2 = 9

9×3=27 and 2+7=9

9×62 = 558; 5+5+8=18; 1+8=9

• The sort of questions you could come up with will depend on what level of math you’re taking.

However, the trick to creating a problem like the one you used as an example is to find a number whose digits will add up to 18, 81, 333, or 90 and which is divisible by 9.

Hope that helps.

• 3 time 3 9#1

• Actually any multiple of 9 follows that same pattern

3 x 9 = 27 , 7 + 2 = 9

36, 54, 63, 72, 81, 90, etc.

• Well, there are millions of possible combinations what can equal 9.

1*9=9

3*3=9

9/1=9

81/9=9

5+4=9

square root of 81=9

14-5=9

1000-991

There are millions of possiblities that you can try. Pretty much any number + or – another number can make nine.

• 9*6=54

5+4=9

• 8×9=72

7+2=9

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