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How many 2-digit positive integers have no odd digits?
I got 20 because since 10s, 30s, 50s, 70s, and the 90s don’t count so what’s remaining is 20s, 40s, 60s and 80s. There are 5 completely even numbers in each set ( for example : 20, 22, 24, 26 and 28) so 5x4 sets = 20 completely even 2 digit numbers. Is this right? Thanks!
I got 20 because since 10s, 30s, 50s, 70s, and the 90s don’t count so what’s remaining is 20s, 40s, 60s and 80s. There are 5 completely even numbers in each set ( for example : 20, 22, 24, 26 and 28) so 5x4 sets = 20 completely even 2 digit numbers. Is this right? Thanks!
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