Question
In each of the following number series, one term is missing. Find the missing term. 160, 153, 141, 122, 94, ?, 3
Solution
Observe the differences: 153 - 160 = -7 141 - 153 = -12 122 - 141 = -19 94 - 122 = -28 ? - 94 = -39 3 - ? = -52 Now second differences are: -12 - (-7) = -5 -19 - (-12) = -7 -28 - (-19) = -9 -39 - (-28) = -11 -52 - (-39) = -13 So the pattern is based on subtracting numbers whose second differences are consecutive odd negatives. Missing term = 94 - 39 = 55 Hence, the missing term is 55.
More Missing Series Questions
- What will come in place of the question mark (?) in the following series? 400, 841, 1202, ?, 1716, 1885
- 562, 628, 698, ?, 850
- In each of the following number series, one term is missing. Find the missing term. 10, 15, 13, 26, ?, 66, 60
- 31Â Â Â 40Â Â Â 51Â Â Â 64Â Â Â 79Â Â Â Â ?
- 32   48   96   ?   720   2520
- If series II follows the same sequence pattern as series I shown below, determine the value of 'p'. Series I: 3, 4, 9, 34, 159, 784 Series II: 38, _, _, _,...
- 45, ?, 84, 114, 151, 195
- Find the missing term in the series: 4, 7, 13, 25, 49, ?
- What will come in place of the question mark (?) in the following series? 24, 8, 15, ?, 12, 4
- What will come in place of the question mark (?) in the following series? ?, 65, 37, 73, 29, 81
