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 3 false and all others true, how many of the 100 items will be correctly answered?

Swim2433 Jul 25, 2020

#1**+1 **

Every multiple 3x4 will be marked false but they are true so that will be 8 marked incorrectly (12 24 36 48 60 72 84 96

all of the other multiples of 4 (25 of them) will be marked as true minus the 8 above

17 /25 will be correct

edited: sorry...i misread the question

17 of 25 will be correct for the multiples of 4

there are 75 other questions that have 'false' as an answer

33 multiple of 3 will be marked false which is a correct answer EXCEPT for the 8 above

33 - 8 = 25 will be correctly marked

25 + 17 out of 100 will be correct 42/100 (__ I think !__ Confusing )

ElectricPavlov Jul 25, 2020