Question:
Complete the matrix: 3 → 12; 5 → 30; 7 → ?
आव्यूह पूरा करें: 3 → 12; 5 → 30; 7 → ?
Options:
- a) 42
- b) 56
- c) 60
- d) 49
- a) 42
- b) 56
- c) 60
- d) 49
correct answer : b)
Explanation:
3→12=3×4=3×(3+1). 5→30=5×6=5×(5+1). 7→7×8=56.
3→3×(3+1)=12. 5→5×(5+1)=30. 7→7×8=56।