Directions: Select the missing number from the given alternatives: 7 6 4 5 10 9 5 4 5 8 6 ? 57 78 34 25

Step-by-step solution

Pattern of the missing element 10 × 5 + 7 = 57, 9 × 8 + 6 = 78, 5 × 6 + 4 = 34, 4 × 5 + 5 = 25 Hence, option A is correct.