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Why do no digits of a prime number add up to 9?
Because they're in multiples of three - a quick way to tell if a number is a multiple of three is to add up the digits and see if the digits add up to a multiple of three e.g 576, 5+7+6=18, 1+8=9, 9 is a multiple of three
A three digit number whose digits add up to 900?
Three digits can't possibly add up to 900. The largest possible sum of 3 digits is (9 + 9 + 9) = 27.
What is the largest three digit number whose digits add to 20?
992
If the ............. of the digits for a whole number is divisible by three then the whole number is also divisible by three?
You would fill in the blank with the word sum, which means that you add each of the digits of the number. If that sum is divisible by three then the number is divisible by 3.
What do you call putting two digits together to make a number?
Add
What is greater 0.0001 or 0.000008?
0.0001 because if you add zeroes to the decimal to make them have the same number of digits you will add zeros to 0.0001 to make it have the same number of digits and you get 0.000100 and it is greater than 0.000008
Is seventytwo a multiple of three?
yes 72/3 equals 24. an easy way to find out if a number is divisible by three is to add up all the digits. if the sum of the digits is divisible by three, the whole number is divisible by three.
How do you find out if a number is divisible by three?
Add up the digits. If that total is a multiple of 3, so is the original number.
What number is a factor of 36 and it is a multiple of 3 and as 2 digits and they add up to three?
12
Which three digits numbers do the digits add up to 25?
There are a variety of three digits that add up to 25. Examples include 9, 8 and 8.
What is the largest 8-digit number with no add digit and only three digits are repeated twice?
It is 99,887,765
You are a three-digit number and a common multiple of 27 and 11 The sum of your digits is 10 What number are you?
Common three-digit multiples of 27 and 11 are 297, 594 and 891. None of their digits add up to 10.
