Assume all questions were answered correctly,  Total score $=50\times4=200$  Difference in total score $=200-110=90$  Change in score $=4+1=5$  No. of incorrect answer $=90\div5=18$  Correct answers $=50-18=32$ 
Tobby attended a Nasional Maths Olympaid (NMO). Tobby answered all $50$ questions. For each correct answer, Tobby will get $4$ marks. However, for each wrong answer, Tobby will deduct $1$ mark. If Tobby scored $110$ marks in total, how many questions did Tobby answer correctly? 
Options:
- $$42$$ 
- $$32$$ 
- $$18$$ 
- $$8$$ 