A6ngDamgarciaBurdoS A6ngDamgarciaBurdoS

22-02-2017
Mathematics

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How many different three-digit numbers between 100 and 1,000 have 5 as the tens digit?

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apologiabiology apologiabiology

22-02-2017

those are the ones that are in 50s or
50,51,52,53,54,55,56,57,58,59
10 numbers per hundred

150
250
350
450
550
650
750
850
950

9 of the hundreds
10 per each
9 times 10=90

so there are 90 of them

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