From School House Rock
G7 C7 G7
Number nine will put you on the spot
C7 Eb9 G7
Number nine will tie you up, oh, in a knot
D7
When you're trying
C7
Multiplying by nine
G7
You might give it everything you've got
C7
And still be stopped
G7 Cm7 EbM7#11 Em7
If you don't know some secret way you can check on
F9 F#9 G7 AbMaj7 G7
You'll break your neck on Naughty number nine
G7
Now the first thing to keep in mind
C9
When you're multiplying by nine
G7
Is that it's one less than ten
G7
You see, nine is the same as ten minus one
C9
So you could multiply your number by ten
C7
And then subtract the number from the result
G7
And you'd get the same product
As if you'd multiplied by nine
And you knew it
D7
I mean, eight times nine is 80 minus eight
C9
And seven times nine is 70 minus seven
G7
And six times nine is 60 minus six
C7
You could use those tricks
G7 Cm7 EbMaj7#11 Em7
Because you must have some secret way you can beat it
F9 F#9
Or else you'll meet it
G7 AbMaj7 G7 F9
With naughty number nine
G7 AbMaj7
Of course, it doesn't hurt
G7
To know the table of nines by memory
D7
It goes like this:
G7 C7 G7
One times nine is nine, and two times nine is 18
G7
(Mean ol' number nine)
C7 Eb9 G7
Three times nine is 27, and four times nine is 36
D7 C7
Five times nine is 45, and six times nine is 54
G7 C7
And seven times nine is 63
G7 Eb9 G7
Eight times nine is 72, and nine times nine is 81
F9 F#9 G7
And ten times nine is 90
G7 AbM7
Now the digit sum is always equal to nine
G7
I mean, if you add two and seven, the digits
F9
You get nine, the digit sum
AbM7
That's true of any product of nine
A9 D7
If they don't add up, you've made a mistake
G7 Cm7 EbM7#11 Em7
Because you must have some secret way you can check it
F9 F#9
Or else you'll wreck it
G7 AbM7 A9 Ab7 G9
With naughty, nasty, mean old number nine
