Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
The "reflection" of a positive integer is obtained by [#permalink]
12 Dec 2003, 01:41
The "reflection" of a positive integer is obtained by reversing
its digits. For example, 321 is the reflection of 123.
The difference between a five-digit integer and its reflection
must be divisible by which of the following?
I have chosen 2, e.g. 98721-12879 = 84942/2 = 42471.
But the answer is not. Can anyone try and explain the correct answer?
five digit integer 98721 the reflection is 12789, not 12879 or 85932 is the difference , as in this case it is divisible by 2,4,6,9 not divisible by 5, we can not say. Try 10000-00001=9999, think it is clear now..
: Social ventures, both non-profits and for-profits, seek to better the world in such industries as education, microfinance, workforce development, public health and community development, among others. Organizations that...