If 'PHONE' is coded as 'QIPOF', then 'MOBILE' is coded as ? MCQ with Answer and Explanation

Explanation:
Pattern: double and subtract 1. 7×2−1=13; 13×2−1=25; 25×2−1=49; 49×2−1=97.

Explanation:
2×2+1=5, 5×2+1=11, 11×2+1=23, 23×2+1=47, 47×2+1=95.

Explanation:
The series follows the pattern of adding consecutive even numbers starting from 4: 2+4=6, 6+6=12, 12+8=20, 20+10=30, 30+12=42. Alternatively, n(n+1): 1×2=2, 2×3=6, 3×4=12, 4×5=20, 5×6=30, 6×7=42.