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Series I: 1 × 1 + 1 = 2 2 × 3 + 2 = 8 8 × 5 + 3 = 43 43 × 7 + 4 = 305 Series II: 6 × 1 + 1 = 7 (B) 7 × 3 + 2 = 23 (C) 23 × 5 + 3 = 118 (D) 118 × 7 + 4 = 830 (E) Series III: F × 1 + 1 = G G × 3 + 2 = H H × 5 + 3 = I I × 7 + 4 = J And, G = 5C + 10 G = (5 × 23) + 10 G = 125 Now we can find the value of F, F × 1 + 1 = G F × 1 + 1 = 125 F = 124 Also, we can find the value of H, G × 3 + 2 = H 125 × 3 + 2 = H H = 377 The difference between F & H = (377 - 124) = 253
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