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How is 29 - 1 = 30?

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2,689 views

How is 29 - 1 = 30?

If also
14 - 1 = 15
11 - 1 = 10
9 - 1 =10

posted Jun 13, 2017 by anonymous

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2 Answers

+2 votes

roman numerals

answer Jun 14, 2017 by anonymous
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if the first number is 9 or 14 or 19 or 24 or 29 or 34 etc then the result = first number +1
else result = first number -1
thanks

answer Jun 14, 2017 by Kewal Panesar



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