Replying to @engineers_feedIf you have to do a math formula to get it, then it’s not an IQ test. My answer is 45 because it doesn’t require doing math, it requires problem solving:
4 + 4
5 + 5 + 5
6 + 6 + 6 + 6
9 + 9 + 9 + 9 + 9
Each equation has one additional digit of itself incrementally increased