Question
15 12 ? 9 21
6 What should come in place of the question mark (?) in the following number series?Solution
15 – 3 = 12 12 + 6 = 18 18 – 9 = 9 9 + 12 = 21 21 – 15 = 6
More Series Questions
1, 7, 25, 61, ?
1595, 1083, 740, 524, 399, ?Â
What will come in place of the question mark (?) in the following series?
130, 158, 214, 298, ?, 550
42, 48, 60, 84, 132, ?
945, 1890, ?, 504, 144, 32
124, 128, ?, 135, 110, 146
9 10 36 333 ? 132825
...18, 35, 68, 117, ?, 263Â
56, 27, 14.5, 6.25, ?, 1.0625
32, 48, 72, 108, 162, ?
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