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Is this fact true A whole number is divisible by 3 if the sum of its digits is divisible by 3?
Wiki User
∙ 10y ago
True fact.
Wiki User
∙ 10y ago
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How do you tell if a number is divisible by four?
If the last two digits of a number are divisible by four, the whole number is divisible by four. This is related to the fact that 100 is a multiple of 4.For example, 12885212 is divisible by 4, because 12 is divisible by 4. No need to divide the entire number.
What is divisibility test for 4?
If the last 2 digits are divisible by 4, then the entire number is divisible by 4. The reason this works is related to the fact that 100 is a multiple of 4.If the last 2 digits are divisible by 4, then the entire number is divisible by 4. The reason this works is related to the fact that 100 is a multiple of 4.If the last 2 digits are divisible by 4, then the entire number is divisible by 4. The reason this works is related to the fact that 100 is a multiple of 4.If the last 2 digits are divisible by 4, then the entire number is divisible by 4. The reason this works is related to the fact that 100 is a multiple of 4.
What number make 371 divisible by 3?
Any number divisible by 3 has digits that add up to a multiple of 3. Adding a 1 to any of these digits or inserting a 1 anywhere in the number would make it divisible by 3.
What is 1.725 as a whole number?
1.725 is not a whole number. The fact that there are non-zero digits after the decimal point is an indication that it cannot be a whole number.
Is 2124 divisible by 9?
You can determine if any number is divisible by nine by adding its digits together: 2 + 1 + 2 +4 = 9 if the result is divisible by 9, then the original number is divisible by 9. In this case, the answer is divisible by 9 so, yes it is (in fact it is 236 x 9).
If the last digit of a number is 6 then is 6 a factor?
Not necessarily. For example, the number 56 ends in a 6 but is not divisible by six. To check if a number is divisible by six, the number must be divisible by both 2 and 3. To check this, the last digit must be even and the sum of the digits must be divisible by three. If the number meets these conditions, it is in fact divisible by six.
How can you find how many three digits number divisible by 7?
3 digits numbers: from 100 to 999 The first number greater than 100 and divisible by 7 is 105 The last number lower than 999 and divisible by 7 is is 987 (987-105)/7=126 intervals of 7-length In fact 127 as numbers are to be counted, not intervals
What is the divisibility rule of 25?
If the last two digits of a number are a multiple of 25 - i.e., 00, 25, 50, or 75 - then the number is divisible by 25. This is related to the fact that 100 is a multiple of 25.
Is 543 a composite number?
Yes, it has divisors other that 1 and itself, e.g. 3,181. In fact by the divisibility condition, "The sum of the digits is divisible by 3, therefore the number itself is divisible by 3", clearly 543 is divisible by 3, i.e. 5+4+3 = 12/3 = 4 making it composite.
Is 744 divisible by 3?
The question wasn't "what is 744 divided by 3?" The question was, "Is 744 divisible by 3?" The answer is, "Yes." In fact, ANY number is divisible by three, but the answer may not be a whole number (e.g. 745 divided by 3 is 248.33333....). Here's a tip. To determine quickly whether any given number is equally divisible by three, add the digits. If that answer has two or more digits, add them. Keep doing this until you get a one-digit answer. If THAT one digit is divisible by three, so is the original number. Obviously, the one digit would be a 3, a 6 or a 9. Example 1: Is 2,169 divisible by 3? 2+1+6+9=18 1+8=9 Nine IS divisible by three so, yes, 2,169 is divisible by 3. Example 2: Is 8,075 divisible by 3? 8+0+7+5=20 2+0=2 Two is NOT divisible by three so, no, 8,075 is not divisible by 3.
What are facts about the number ten?
There are a great many facts about the number 10 such as the fact that it is divisible by 5. It is also divisible by the number 2.
Does 6 go evenly into 35?
No. To be divisible by 6 the number must be divisible by both 2 and 3. To be divisible by 2, the last digit of the number must be even (ie one of {0, 2, 4, 6, 8}). The last digit of 35 is 5 which is not even and so 35 is not divisible by 2. To be divisible by 3, sum the digits of the number and if this sum is divisible by 3 then so is the original number. As the test can be applied to the sum, repeatedly summing the digits of the sums until a single digit remains, then the original number is divisible by 3 only if this single digit is one of {3, 6, 9}. For 35 3 + 5 = 8 which is not divisible by 3 (nor is is one of {3, 6, 9}, thus 35 is not divisible by 3. As 35 is not divisible by both 2 and 3 (in fact it is divisible by neither 2 nor 3) it is not divisible by 6.
