Posted by Paul on Sunday, December 4, 2011 at 8:55pm.
After 93 was divided by some number n, the remainder was 2, so clearly n >2
Divisor - remainder
3 ...... 0
4 ...... 1
5 ........ 3
6 ........3
7 ....... 2 yeahh
they formed 13 groups of 7 , leaving 2 students left over
If two students were left, there are 93-2=91 students who were in groups of equal size.
Find factors of 91 and you will have a choice of two, one of which is under 10, which is also the number of students per group. The other factor (greater than 10) is therefore the number of groups formed.
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