Solution:जिस प्रकार,TOM = 20 × 15 + 15 × 13 + 13 × 20
= 300 + 195 + 260
= 3 + 0 + 0 + 1 + 9 + 5 + 2 + 6 + 0
= 26
= 2 + 6 = 8
तथा MAT = 13 × 1 + 1 × 20 + 20 × 13
= 13 + 20 + 260
= 1 + 3 + 2 + 0 + 2 + 6 + 0 = 14
अत: (1 + 4) = 5
उसी प्रकार,
TOP = 20 × 15 + 15 × 16 + 16 × 20
= 300 + 240 + 320
= 3 + 0 + 0 + 2 + 4 + 0 + 3 + 2 + 0 = 14
अतः (1 + 4) = 5