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Earn +20 ptsQ: How many times digit 9 repeats from 1-100?
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How many different 2 digit numbers can be formed from the digits 2 6 7 and 8?
Without repeats there are 4 × 3 = 12 possible 2 digit numbers. With repeats there are 4 × 4 = 16 possible 2 digit numbers.
How many two digit numbers can be made using the digits 1234?
With repeats: 4×4 = 16; Without repeats: 4×3 = 12.
How many social security numbers can there be if the first digit cannot be a zero and repeats are allowed?
Well if repeats are allowed, then unlimited. If you can repeat the numbers then the list would go on forever.
How many times as great is the underlined digit 5 in 365485201 than the digit 5 that is not underlined?
how many times gerater is the underlined digit 5 in 365,486,201 than the digit 5
How many 3 digit even numbers can be formed by using numbers 01234?
Assuming leading zeros are not permitted, then: If repeats are not allowed there are 30 possible numbers. If repeats are allowed there are 60 possible numbers.
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