posted by YY at 2:05:00 AM
This one bluff people one lah ... Assuming the number you choose is "ab", it can be represented as "10a + b" (e.g. 79 = 10*7 + 9). Now, deduct a and b from this number, and you get "9a". Voila! Your result will always be a multiple of 9.
By Amleth, at 10:20 PM
Post a comment
<< Home
This blog tells you my thoughts and things happening in my life.
1 comment(s):
This one bluff people one lah ...
Assuming the number you choose is "ab", it can be represented as "10a + b" (e.g. 79 = 10*7 + 9). Now, deduct a and b from this number, and you get "9a". Voila! Your result will always be a multiple of 9.
By Amleth, at 10:20 PM
Post a comment
<< Home