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Problem 23109650321 (Posted on 2010-06-14) Difficulty: 3 of 5
What is the next number in this series? Explain. 23109650321_

  Submitted by John zadeh    
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Solution: (Hide)
12 X 11 = 132, reverse it to get 231 ....10 X 9 = 90, reverse it to get 09 ....8 X 7 = 56, 65 ....6 X 5 = 30, 03 ....4 X 3 = 12, 21 ....ANSWER: 2 X 1 = 2, reverse it to get 2

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  Subject Author Date
Hints/Tipsre: PunctuationAdy TZIDON2017-06-21 11:02:39
QuestionPunctuationbroll2010-06-16 10:53:13
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