0
Call the two digit number xy. So: 10x + y = 2(x + y)
Multiplying out: 10x + y = 2x +2y
Rearranging: 8x = y We can at this point introduce the constraints that x and y must be integers between 0 and 9. Only one value of x will allow this: 1. So y = 8. The answer, then, is 18. Call the two digit number xy. So: 10x + y = 2(x + y)
Multiplying out: 10x + y = 2x +2y
Rearranging: 8x = y We can at this point introduce the constraints that x and y must be integers between 0 and 9. Only one value of x will allow this: 1. So y = 8. The answer, then, is 18.
What else can I help you with?
What two digit number is twice the sum of its digits?
18 is the only number that matches these criteria.
Translate the difference between twice a number and four time the sum of the number and seven is equal to two?
The difference between a number x and twice y is equal to fifteen.
What is the smallest whole number that is equal to seven times the sum of its digits?
21
The sum of the digits of a two digit number is 9 the number itself is equal to twice the product of its digit find the number?
The Answer is 36 btw. 3 + 6 = 9 3 x 6 = 2(3x6) 2(18) = 36
The units digit of a two digit number exceeds twice the tens digit by 1 what numbers if the sum of its digit is 10?
The units digit of a two digit number exceeds twice the tens digit by 1. Find the number if the sum of its digits is 10.
A number that is equal to the sum of the digits of its cube?
8 is the same as the sum of the digits of its cube, 512.
What is the smallest whole number that is equal to twice the sum of its digits?
18 1 + 8 = 9 and 9 x 2 = 18
What is the only number whose value is twice the sum of its digits?
18
What is that number where the sum of its digits and its square root are equal?
81
What two digit number is twice the sum of its digits?
18 is the only number that matches these criteria.
What number is twice the sum of its digits?
18. 1+8=9 9x2=18
Is 18 the only number that is twice the sum of its digits?
Yes, unless you include 0.
Is 34215 divisible by 3?
Any number whose sum of its digits are equal to a multiple of 3, is divisible by 3. In this instance, the sum of the digits of the number 34215 is equal to 15, which is divisible by 3, and therefore the number is divisible by 3.
If the number of two digits are reversed it becomes 36 greater than the number find the number if the sum of the digits is equal to 8?
26
If a number with two digits is equal to four times the sum of its digits the number formed by reversing the order of the digits is 27 greater than the given number what is the number?
36
What are some What are facts about the number 18?
18 is the only number (other than 0) that is twice the sum of its digits.
A number for which sum of all its factors is equal to twice the number is called?
composite number
