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What two digit number is three times the sum of its digits?
27
3(2+7)=27
3(2+7)=27
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What two digit number is 5 times the sum of its digits?
Answer: 45.
4 + 5 = 9 x 5 = 45
What is the number of a two digit number that is four times the sum of its digits The tens digit is 3 less than the units digit?
36.
[1] b − 3 = a [2] 4(a + b) = 10a + b [3] 4a + 4b = 10a + b Substitute [1] (b − 3) for a in [3]: [4] 4(b − 3) + 4b = 10(b − 3) + b [5] 4b ⅈ’ 12 +4b = 10b − 30 + b [6] 18 = 3b [7] 6 = b [8] 3 = a
A number is three times the sum of its digit find the number?
Is this exactly how the problem was written?
What is the sum of a two digit number less the sum of its digits?
There exist no numbers which are less than the sum of their digits. This is obvious for single digit numbers, since each number would be exactly equal to the sum of its dig…its. For multi-digit numbers, this still holds true. Let's take a two digit number in the form: ab. Where a and b represent the digits of this number. The sum of the digits of ab = a + b. The number ab = a*10 + b. It should now be obvious that ab will always be greater than a + b. For larger numbers, the difference between the sum of digits and the number only grows, as a number abc = a*100 + b*10 + c, abcd = a*1000 + b*100 + c*10 + d, etc. Proof by exhaustion (via Java code, since this is listed in the programming category): for (int n = 10; n = sumDigits for all 10
Two digit number is three more than 7 times the sum of it's digits?
If there are two digits than the first one is ten times its value. So as an algebraic equation we get 10A + B - 3 = 7(A x B) This can be simplified to 10A + B - 3 …= 7A + 7B and this reduces to 10A - 7A = 7B - B +3 or 3A =6B +3 A solution to this is 3(3) = 6(2) +3 Which would make the original equation 32 = 7(3+2)-3
A two digit number is four times the sum of its digits?
Call the digits 'A' and 'B', so that the number is written: AB. 10A + B = 4 (A+B) 10A + B = 4A + 4B 6A = 3B 2A = B ---> any 2-digit number where the units digit is… twice the tens digit 12 or 24 or 36 or 48
What is two digit number which is nine times the sum of its digits?
81 : 8 + 1 = 9, and 9 x 9 = 81. Here's how to figure: If the 2-digit number is ab,. then the number is equal to 10*a + b. And nine time the sum equals 9*(a + b). Set these… two equal and you have: .
9*a + 9*b = 10*a + b --> 8*b = a. Knowing that the digits must be in the range 1 through 9: 1 x 8 = 8, and 2 x 8 = 16, so the only possibility is a=8 and b=1.
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What is the number of a two digit number that is four times the sum of its digits The tens digit is 3 less than the units digit what are you?
Let's break it down: "What is the two digit number ..." x is the 10's place; y is the 1's place; and z is the answer. 10x + y = z "... that is [equal to] 4 times the sum of… its digits ..." 4(x + y) = 10x + y "... The tens digit is [equal to] 3 less than the units [1's] digit ..." x = y - 3 Break down the complex equation: 4x + 4y = 10x + y 3y = 6x Substitute the other equation for x, because x = y - 3, and continue: 3y = 6(y - 3) 3y = 6y - 18 -3y = -18 -y = -6 y = 6 So 6 is y, the 1's number. x = y - 3 x = 6 - 3 x = 3 And 3 is x, your 10's number. Almost there! Now find your final answer, z: 10x + y = z 10(3) + 6 = z 30 + 6 = z 36 = z Your answer is 36.
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What is the sum of the two digit number?
The sum of the two digit number depends on what the number is for e.x. 27 + 32= 59. You get this by first adding the 7 and the 2 together, because if you would line the proble…m up and down the would be lined up directly below or above each other, getting an answer of nine. Then you add the 3 and the 2 together getting an answer of 5. To complete your results you will put the five in the front because it is the sum of 3 and 2 and they were both in the front and then you will write the 9 at the end because it is the sum of the 7 and the 2 and they were both at the end of the number.
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What is the sum of the first three two-digit prime numbers?
11 + 13 + 17 = 41
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What is the sum of the first three two-digit prime number?
Their sum is 41.