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Does a quadratic has a even number of roots?
Yes, but only if you count a root at the tangent as a double root.
What is the only number equals double its own square root?
4
What is a number written as the sum of values of digits called?
It is called the digital sum. If you keep doing it until you reach a single digit answer, it is called a digital root. The term digital root is sometimes also used for the digital sum. For example, 3042 gives the digital sum of 3+0+4+2 = 9 which is also its digital root. but 3047 gives the digital sum of 3+0+4+7 = 14 and the digital root is 1+4 = 5.
What 3 identical digit number divided by 9 has a remainder of 5?
There is none. Any number formed from 3 identical digits must have a digital root of 0, 3 or 6. These are, therefore, the only possible remainders when divided by 9. Note: The digital root of a number is the sum of all its digits. If the answer is greater than 9, repeat the process.
Is 3852 divisible by 6?
A trick to see if a number is divisible by 3, 6, or 9 is to use something called the digital root.First, add all the digits up:3+8+5+2 = 18We want a single digit, so add the digits in 18 (from the previous step) up:1+8 = 9The nine (a single digit) is called the digital root.If a digital root of a number is equal to 3, 6, or 9 than the number is divisible by 3.If a digital root of a number is equal to 3, 6, or 9 AND the number is even, than the number is divisible by 6.If a digital root of a number is equal to 9, than the number is divisible by 9.The digital root of 3852 is 9, and 3852 is even, so using the rules above the number is divisible by 3, 6, AND 9.
What numbers are not divisible by 9?
There an infinity of such numbers. One test for divisibility by 9 depends on the digital root. The digital root of any number is the sum of all its digits. If the digital root of a number (or the digital root of its digital root) is divisible by 9 then the original number is, and if the DR is not then the original number is not.
Does a quadratic has a even number of roots?
Yes, but only if you count a root at the tangent as a double root.
What is the only number equals double its own square root?
4
What numbers will be divisible by 9?
Any number whose digital root is 9.To find the digital root of a number,add together all its digits.if the answer is bigger than 9, go back to step 1. Otherwisethe sum is the digital root.
When is a number divisible by 18?
When its digital root is 9 (divisible by 9) and it is even (divisible by 2). The digital root of a number is calculated by adding up all the digits in a number. If the answer is greater than 9, then repeat until you get an answer that is a single digit.
What is a number written as the sum of values of digits called?
It is called the digital sum. If you keep doing it until you reach a single digit answer, it is called a digital root. The term digital root is sometimes also used for the digital sum. For example, 3042 gives the digital sum of 3+0+4+2 = 9 which is also its digital root. but 3047 gives the digital sum of 3+0+4+7 = 14 and the digital root is 1+4 = 5.
What 3 identical digit number divided by 9 has a remainder of 5?
There is none. Any number formed from 3 identical digits must have a digital root of 0, 3 or 6. These are, therefore, the only possible remainders when divided by 9. Note: The digital root of a number is the sum of all its digits. If the answer is greater than 9, repeat the process.
Is 3852 divisible by 6?
A trick to see if a number is divisible by 3, 6, or 9 is to use something called the digital root.First, add all the digits up:3+8+5+2 = 18We want a single digit, so add the digits in 18 (from the previous step) up:1+8 = 9The nine (a single digit) is called the digital root.If a digital root of a number is equal to 3, 6, or 9 than the number is divisible by 3.If a digital root of a number is equal to 3, 6, or 9 AND the number is even, than the number is divisible by 6.If a digital root of a number is equal to 9, than the number is divisible by 9.The digital root of 3852 is 9, and 3852 is even, so using the rules above the number is divisible by 3, 6, AND 9.
What to subtract to get a number divisible by 9?
Subtract the remainder which is left when the digital root is divided by 9.
Square root of a double complex number?
Do you mean like a double floating point number, which is a complex number; or a double matrix type number like in the related link on springerlink.com
How does doubling a number affect its square root?
When you double a number, the square root of the new one is sqrt(2) = 1.4142 times the square root of the original one.
What number will go evenly into 102?
When a number "goes evenly" into another number, we just say that number divides another number. Example: 2 divides 102. This is denoted with a vertical bar, "|", e.g. 2|102The number is even, so 2 divides 102.Quick lesson on digital roots. Digital roots are summing the digits of a number, until you are left with a single digit.Example: Find the digital root of 9939 + 9 + 3 = 21 (not a single digit, repeat the process)2 + 1 = 3Therefore, the digital root of 993 is 3.Now this is where digital roots come in handy:If the digital root of a number is equal to 3, 6, or 9 then 3 divides that number.If the digital root of a number is equal to 3, 6, or 9 AND is even then 6 divides that number.If the digital root of a number is equal to 9, then 9 divides it.The digital root of 102 is 1+0+2=3 and 102 is even.So 3|102 and 6|102102/2 = 51, therefore 51|102102/3 = 34, therefore 34|102102/6 = 17, therefore 17|102Numbers that evenly go into 102 are:2, 3, 6, 17, 34, and 51 (1 and 102 can also be included)
