9 × 2 – 1 = 17 17 × 3 + 1 = 52 52 × 2 – 1 = 103 103 × 3 + 1 = 310 310 × 2 – 1 = 619
12, 10, 23, 65, 265, 1289
9 17 53 103 310 619
...9 17 53 103 310 619
...Find the wrong number in given number series.
2556, 2613, 2734, 2841, 3012, 3221
72, 36, 54, 135, 470.5, 2126.25
11 9 20 18 37 36
...134, 159, 186, 215, 266, 279
216, 432, 144, 288, 96, 191, 64
24, 12, 22.5, 45, 157.5, 708.75
15, 30, 30, 20, 10, 8
