On a true-false test of 100 items, every question that is a multiple of 4 is true, and all others are false. If a student marks every item that is a multiple of 5 false and all others true, how many of the 100 items will be correctly answered?
If it is NOT a multiple of 4 and stud marks it 'false' it is a correct answer 15 correct answers 5 incorrect
if it IS a multiple of 4 and stud marks it 'true' it is a correct answer 20 correct
35 out of 100 correct (I think !.....confusing, huh?)
