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Earn +20 ptsQ: How many 4-digit numbers can be formed using the digits 1 2 3 4 5 6 7 8 and 9?
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How many 6 digit numbers can be formed using the digits 123456789?
There are 60480 numbers.
How many six digits numbers can be formed using 1234?
There are 4^6 = 4096 such numbers.
How many four digits numbers can be formed using 0578?
If the digits are all different then 18. Otherwise, 192.
How many odd numbers less than 100 can be formed by using the digits 0 3 5 7 when repetition fo digits is not allowed?
9 odd numbers less than 100 can be formed. They are: 3,5,7,35,37,53,57,73 and 75.
How many three digit numbers can be formed using 01234?
48 of them if digits may not be repeated. 100 if they can.
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