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How many two digit numbers are either multiples of 3 or multiples of 5?
There are 30 two-digit multiples of 3 plus 18 two-digit multiples of 5 minus 6 two-digit multiples of both. Answer: 42
How many two digit counting numbers are not multiples of 10?
81 of them.
How many two and three digit numbers can i make that are multiples of five?
198 of them.
Which two digit numbers have the fewest factors?
The prime numbers from 11 to 97.
Which two digit numbers have fewest factors?
All two digit prime numbers have two factors only, starting with 11, 13, 17, 19.......
What two-digit prime number has the sum of its digits that is not 7 but is a multiple of 7?
No two digit prime number exists that is a multiple of 7. All two digit numbers that are multiples of 7 are compositenumbers.
How many two digit prime numbers are there?
There are 21 two-digit prime numbers.
Is 29 a two digit composite number?
no it is a prime number (prime means its multiples are only 1 and itself composite numbers can have multiples of many other things)
How many two digit numbers are either multiples of 3 or multiples of 5?
There are 30 two-digit multiples of 3 plus 18 two-digit multiples of 5 minus 6 two-digit multiples of both. Answer: 42
How many two digit numbers are not multiples of 2?
All of the odd numbers between 11 and 99 inclusive are two digit numbers that are not multiples of 2. There are 45 of them.
How many two digit counting numbers are either multiples of 2 or multiples of 3?
60 numbers
What is the largest two-digit number that is prime and has prime numbers for both of its digits?
73 is the largest two-digit number that is prime and has prime numbers for both of its digits.
How many two-digit counting numbers are not multiples of 10?
81
How many two digit counting numbers are not multiples of 10?
81 of them.
What is the product of the largest single-digit prime number and the largest two-digit prime numbers?
679 is the product of the largest single-digit prime number and the largest two-digit prime number.
