CUET Preparation Today
What is missing term in given series? |
77 87 97 109 |
109 |
The correct answer is Option (4) → 109
The logic here is : (1st × 2nd) - (1st + 2nd) = 3rd no.
1) 4, 7, 17 ⇒ (4 × 7) - (4 + 7) = 28 - 11 = 17
2) 7, 9, 47 ⇒ (7 × 9) - (7 + 9) = 63 - 16 = 47
3) 11, 12, ? ⇒ (11 × 12) - (11 + 12) = 132 - 23 = 109 |
