Possibility of two digit no whose sum is 9
18,27,36,45,54,63,72,81
Now add 9 to each no mentioned above
27,36,45,54,63,72,81,90
See after third comma 45 and 54. Reverse of 45 is 54. 54 is 9 more than the no 45.
So 45 is original
192
To total 17 the two digits must be 8 and 9! The original number was 98.
11yrs.
Find a four digit number whose digits will be reversed when multiplied by nine?
Possibility of two digit no whose sum is 10 19,28,37,46,55,64,73,82,91 Now add 54 to each no mentioned above 73,82,91,100,109,118,127,136,145 See after 1st comma 28 and 82 Reverse of 28 is 82. That no 82 is 54 more than the no 28. So 28 is the original
63
The number is 36
17
192
If the number with the digits reversed can have a leading 0 so that it is a 1-digit number, then 16. Otherwise 13.
five digits number when you multiply by four is the same the number when you reversed it is 21978*4 = 87912
To total 17 the two digits must be 8 and 9! The original number was 98.
An eight digit number with one zero cannot remain the same when its digits are reversed. It must have an even number of 0s.
after 11yrs.
11yrs.
47 Impossible problem!
Find a four digit number whose digits will be reversed when multiplied by nine?