Question

Which of the following numbers will replace the question mark (?) in the given series? 5, 13, 23, 49, ?, 193

• A. 95
• B. 120
• C. 105
• D. 82

Answer 1

Answer:

A. 95

The number that will replace the question mark (?) in the series is 95.

The series follows an alternating pattern of multiplying by 2 and then adding or subtracting 3:

• 1st term to 2nd term: $(5 \times 2) + 3 = 10 + 3 = \mathbf{13}$

• 2nd term to 3rd term: $(13 \times 2) - 3 = 26 - 3 = \mathbf{23}$

• 3rd term to 4th term: $(23 \times 2) + 3 = 46 + 3 = \mathbf{49}$

• 4th term to 5th term (?): $(49 \times 2) - 3 = 98 - 3 = \mathbf{95}$

• 5th term to 6th term: $(95 \times 2) + 3 = 190 + 3 = \mathbf{193}$