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sdas [7]
3 years ago
5

Ike likes numbers only if the sum of their digits is 9. How many digits between 10-100 does he like? *

Mathematics
2 answers:
loris [4]3 years ago
6 0
There are many divisibility tests. ... 9: A number is divisible by 9 if the sum of its digits is divisible by 9. .... Each number has only two factors: 1 and itself. 6 ...
Rashid [163]3 years ago
4 0
Ok so its 8 `1&8   2&7 3&6  4&5 and then all of those numbers reversed 
18 27 36 45 and 81  72 63  54
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