Which one of the following is different from the rest of the three: Direction, Compass, Needle, Magnet?

Which one is different from the rest three?

Which one of the following numbers is different from other three: 94, 67, 85, 13?

Which of the following group of letters is different from the others?

Select the one which is different from the other three:

Which of the following groups of letters is different from the others?