What number should replace the question mark?
Answer & explanation
Correct answer: option 3
LOGIC IS;
1) 12, 63, 6, 9 are related to each other that we will find out below;
to find out the pattern we will, 12x6 = 72-9 = 63
Same with, 15x5= 75-19 = 56
Similarly,
13x4 = 52-7 = 45
Thus, 45 is correct.