There are only five distinct odd digits.
155
Three - all nonzero digits are significant.
5555
The 3-digit numbers are all the counting numbers from 100 to 999.That's (the first 999 counting numbers) minus (the first 99 of them).There are 900 of them.
1,2,3,4 1+2+3+4=10 4 times 3 times 2 times 1 =24 24 counting numbers
1235; 1253; 1325; 1352; 1523; 1532; 2135; 2153; 2315; 2351; 2513; 2531; 3125; 3152; 3215; 3251; 3512; 3521; 5123; 5132; 5213; 5231; 5312; 5321. These are 24 such numbers which have four distinct nonzero digits and add up to 11.
Not too sure of the question but how about 0.77775
No, counting numbers you can ignore or say they have an infinate number of significant digits. By counting numbers I mean things you count, or non measurements, or numbers you wouldn't round to significant digits anyway . Measurements always have significant digits.
There are only five distinct odd digits.
155
Two - all nonzero numbers are significant.
Three - all nonzero digits are significant.
Three - all nonzero digits are significant.
Three. All nonzero digits are significant.
Five. All nonzero digits are significant.
Three. All nonzero digits are significant.