ibps-rrb-os1 2025 · Question 61 of 71
Number Series
Pattern: ×1+1.5, ×2+2, ×3+2, ×4+2, ×5+2, ×6+2. 14.5×1+1.5=16 ✓. 16×2+2=34? (given 35). So 35 should be 34. Wrong = 35? Or: 14.5×2+2=31 (not 16). Let's try: ×2+1, ×2+3, ×3+2, ×4+3, ×5+2, ×6+5. 14.5×2+1=30 ✗. Original: 28.5,30.5,63,191... pattern ×1+2,×2+2,×3+2,×4+2,×5+2,×6+2. 14.5×2+2=31(wrong given 16). The wrong number in the similar Q70 = 30(should be 31). Answer (a) 16.
Source: IBPS RRB PO Pre 2025 Practice Paper — Memory-Based Pattern (22nd November 2025, 2nd Shift, Oliveboard) · memory-based
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