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How many three digit numbers contain any odd digits?
874
How many keystrokes are needed to type numbers from 1 to 1000?
There are nine numbers which contain only one digit. There are 90 numbers which contain two digits. There are 900 numbers which contain three digits. There is one number which contains four digits.Therefore, the number of digits is equal to (9x1)+(90x2)+(900x3)+4 = 2893 digits. If this includes spaces, there would be 999 spaces, therefore there would be 3892 keystrokes.
How many three-digit numbers contain only the digits 5 and 6?
Six three-digit numbers contain only the digits 5 and 6. This is assuming you mean both the digits of 5 and 6. If not than 8, as it would include 555 and 666. 556, 565, 566, 655, 656, 665
What are three consecutive square numbers?
There are no three consecutive numbers that are squares. Otherwise, there are an infinite sets of squares of three consecutive numbers: for example, {1,4,9}, or {4,9,16} or {576, 625, 676}
How many whole numbers have 3 digits?
there are 899 whole numbers that have three digits.
What numbers have three factors?
Squares of prime numbers have only three factors.
What are all the numbers that have three factors?
That's an infinite list. Numbers with three factors are the squares of prime numbers.
What are the composite numbers with only three factors?
squares of prime numbers
What type of numbers would have only three divisors?
prime squares
Numbers that have exactly three factors?
Squares of primes.
How many numbers between 2 and 20 are perfect squares?
Three numbers.
How many strings of 3 decimal digits do not contain the same 3 digits?
How many strings of three digits are there? 000 to 999, or a total of 1000. How many strings of three digits contain the same three digits? That's 000, 111, 222 ... 999! ten in total. The difference is your answer: 1000-10 = 990.
