0
The difference between a 2-digit number and its reverse is always a multiple of 9?
Wiki User
∙ 14y ago
-7
Aurelia Rohan
Wiki User
∙ 14y agoYes, and it's 9 times the sum of the digits. Think of the first number as 10x + y, then its reverse is 10y - x. Subtracting gives 9x - 9y ie 9 (x - y), a multiple of 9. For example, taking 7 and 1 as the numbers, then 71 - 17 = 9 (7 - 1) ie 9 x 6 = 54 QED
Add your answer:
Earn +20 pts
A 2digit number with 2 different digits has a special property When a sum of its digits is added 2the product of its digits the result is the numberitself.What is the smallest number with thisproperty?
The answer is 39. 3+9=12, 3x9=27. 12+27=39.
Using four different digits what is the least sum you can get when you add two 2digit numbers?
10 + 23 = 33 Lowest possible real number 97 + 86 = 183 Highest possible real number 02 + 13 = 15 Lowest possible number 97 + 86 = 183 Highest possible number
How many 10 digit palindromic numbers are there?
well, i think if you use this you can find out. A = 1-9 ,B = 0-9 , C = 0-9 , D = 0-9 , E = 0-9 for 2digit numbers = A A for 3 digit numbers = A B A for 4 digit numbers = A B B A and so on till you get to for 8 digit numbers = A B C D D C B A for 9 digit numbers = A B C D E D C B A and last for 10 digit number = A B C D E E D C B A this should work...
What is the largest 2digit composite number?
It is: 99
What is the smallest 2digit number divisible by 4?
12
How do dividing 2digit by 1 digit numbers?
to do it the long way do it by long division to do it the short way put it in the calculator 2 digits numbers are just the numbers between10-99 and one digits numbers are just the numbers between 0-9.
Is a 2digit number the two digits differ by3 the numbers square root isa single digit the number has 3 as a factor?
36
What four digit number has 2digit smaller than digit 4 which is two thirds of digit 1 which is two of digit 3 which is three times digit 2?
6134
What the number of whole numbers between the smallest whole number and the greatest 2digit number is?
There is no smallest whole number - negative numbers go on forever. Therefore, there are infinitely many whole numbers that are smaller than the greatest 2-digit number.
What is the 2digit power ball worth?
Matching one number and the Powerball is worth four dollars. Matching two numbers and the Powerball is worth seven dollars. The higher numbers are dependent on the jackpot total.
A 2digit number with 2 different digits has a special property When a sum of its digits is added 2the product of its digits the result is the numberitself.What is the smallest number with thisproperty?
The answer is 39. 3+9=12, 3x9=27. 12+27=39.
Phase1- 1 digit denominator and 1 digit numerator. phase2-1 digit numberator and 2 digit denominter. 3-2digit denom and numerator. use numbers 1-9 only. do not repeat numbers 1-9.what are the numbers?
oo..this one is very hard.
Using four different digits what is the least sum you can get when you add two 2digit numbers?
10 + 23 = 33 Lowest possible real number 97 + 86 = 183 Highest possible real number 02 + 13 = 15 Lowest possible number 97 + 86 = 183 Highest possible number
How many 10 digit palindromic numbers are there?
well, i think if you use this you can find out. A = 1-9 ,B = 0-9 , C = 0-9 , D = 0-9 , E = 0-9 for 2digit numbers = A A for 3 digit numbers = A B A for 4 digit numbers = A B B A and so on till you get to for 8 digit numbers = A B C D D C B A for 9 digit numbers = A B C D E D C B A and last for 10 digit number = A B C D E E D C B A this should work...
