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What are the thirteen two digit multiples of seven?
14,21,28,35,42,49,56,63,70,77,84,91,98
Why is any 2 digit number with 2 identical digits divisible by 11?
The 2-digit multiples of 11 all have identical digits.
What are the rules of multiples of 11?
The only multiples of 11 are 1 and itself, so it is a prime number. This is the answer to the question "what are the factors of 11". Multiples of 11 can be determined as follows. Find the sum, mod 11 of the alternate digits in the number. The difference will be zero. Examples: - 1,529. 1+2 = 3 [the thousands digit plus the tens digit], 5+9 = 14 which is 3(mod 11) [the hundreds digit plus the units digit]. Difference between the two sums is zero, therefore 1,529 is a multiple of 11 . 12,345. 1+3+5 = 9, 2+4 = 6. difference is 3, therefore 12,345 is not a multiple of 11.
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.
The sum of any two-digit number and the number formed by reversing the digits is always divisible by what?
The sum of any two-digit number and the number formed by reversing the digits is always divisible by 11. This is because when you add a two-digit number to its reverse, the result will always be a multiple of 11. This is because the difference between the original number and its reverse is always a multiple of 9, and when you add two multiples of 9, the sum will always be a multiple of 11.
What is the sum of two digit multiples of 11?
495
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.
What are the thirteen two digit multiples of seven?
14,21,28,35,42,49,56,63,70,77,84,91,98
What are the two-digit multiples of 9?
The two-digit multiples of nine are 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.
Why is any 2 digit number with 2 identical digits divisible by 11?
The 2-digit multiples of 11 all have identical digits.
What are the rules of multiples of 11?
The only multiples of 11 are 1 and itself, so it is a prime number. This is the answer to the question "what are the factors of 11". Multiples of 11 can be determined as follows. Find the sum, mod 11 of the alternate digits in the number. The difference will be zero. Examples: - 1,529. 1+2 = 3 [the thousands digit plus the tens digit], 5+9 = 14 which is 3(mod 11) [the hundreds digit plus the units digit]. Difference between the two sums is zero, therefore 1,529 is a multiple of 11 . 12,345. 1+3+5 = 9, 2+4 = 6. difference is 3, therefore 12,345 is not a multiple of 11.
Are there an infinite amount of multiples of 11 that have an odd digit sum?
Yes, that is correct.
How many two digit counting numbers are either multiples of 2 or multiples of 3?
60 numbers
How many two-digit counting numbers are not multiples of 10?
81
What two digits appear as the last digit of the multiples of 5?
95, is the two digits after the last digit of the multiple of 5's.
What is the only 2-digit palindromic number that is prime?
A palindromic number is the same forwards as backwards. In the case of a two-digit number, that means the two digits are the same: 11, 22, 33, 44, 55, 66, 77, 88, and 99. The only one that is prime is 11, since the others are all multiples of 11.
How many four digit counting numbers are not multiples of two?
4500 of them.
