99 groups of 9, or, 9 groups of 99 are 891
To make five nines equal 100, you can use basic mathematical operations. One way to achieve this is by adding the five nines together: 9 + 9 + 9 + 9 + 9 = 45. Then, you can multiply this result by 2: 45 x 2 = 90. Finally, add 10 to 90 to reach 100: 90 + 10 = 100.
The multiples of 9 arex9=9x9=18x9=27x9=36x9=45x9=54x9=63x9=72x9=81x9=90x9=99x9=108