1,2,3,4,6,9,12,18,36, and 72 are the nine factors of 72 and 72 < 100.
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99 (= 11 x 9) is the largest multiple of 11 less than 100.
63
all factors of 4 and all factors of 9 ex: 4, 9, 36, 72...etc
There are 11 multiples of 9 less than 100. They are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90 and 99.
97.97 is less than 100 and more than 89.the tens digit (which is 9) is two more than the ones digit (which is 7)