alleryWhat is nine nines?
A99
B72
C81
D90
Answer & Solution
Correct answer: C. 81
1. Nine nines make 81.
2. Check: 9 × 10 = 90, minus 9 gives 81.
3. 72 is 9 × 8.
_Source: Wikipedia, Multiplication table (CC BY-SA 4.0, rev 1379867676), Chinese and Japanese multiplication tables_
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