If a 100 n weight sits on a scale in a express elevator, what will happen to the weight shown on the scale when the elevator accelerates upward?

The phrasing of the question is weird, but the mass should not change. The scale may read higher for a moment, but once the mass is brought up to the same velocity of the elevator, it should settle back to 100.

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.