Question 209310: I'd have a question; how do I find out how many odd 2 digit numbers are greater than 30?
Found 2 solutions by RAY100, MathTherapy:
Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! The 1st odd 2 digit number >30 is,,,,,,31
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The last odd 2 digit number (less than 100) is,,,,99
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99-31=68 total number gaps,,,,,divided by 2(odd & even) = 34 number gaps
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since we are counting 1st and last, add 1 to gap = 35 total numbers
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checking, 31,33,35,37, 39,,,,,makes 5 numbers for the 30's
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This repeats for the 40's, 50's, 60's, 70's, 80's,and 90's,,,or 7 times
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5*7=35 total numbers,,,,ok
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Answer by MathTherapy(10552)  (Show Source):
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