GPrep Question 20 - divided by 7

[shahab03]

[thephoenix]

best way is to use no's.
s1)
if the # is 161 rem is 0
if its 162 rem is 1
two differing values
hence insuff

s2)113 rem is 1
123 rem is 4

two differing values
hence insuff

s1)+s2)
let the # is 163
rem is 2
263 rem is 4
363 rem is 6

hence rem changes
hence insuff

IMO E