Tips & Tricks The logic follows here is:- Add the place value of digit – 1 RIP → R + I + P = 18 + 9 + 16 – 1 = 43 – 1 = 42. MOL → M + O + L = 13 + 15 + 12 – 1 = 40 – 1 = 39. Similarly, GAN → G + A + N = 7 + 1 + 14 – 1 = 22 – 1 = 21. Thus, the correct answer is “21”.