Multiple choice In the following number series find the missing term- 12 18 45 157.5 ? 715 728.75 740.25 708.75 775 Reveal answer Fill a bubble to check yourself D Correct answer Explanation The pattern is: multiply the previous term by 1.5, then increase the multiplier by 0.5 each step. 18 = 12 × 1.5, 45 = 18 × 2.5, 157.5 = 45 × 3.5, and 708.75 = 157.5 × 4.5.