Question
Find the length of the side of a regular octagon which
is formed by cutting the corner of square of side 30 cm?Solution

5, 5, 15, 75, ?, 4725
What will come in place of the question mark (?) in the following series?
206, 187, ?, 157, 146, 139
7, 6, 10, 27, 104, ?Â
21, 37, 73, 137, ?, 381
- What will come in place of (?) in the given number series.
5, 10, 8, 16, 11, ?, 17 What will come in place of the question mark (?) in the following series?
72, 108, 172, ?, 416, 612
64Â Â Â Â 32Â Â Â Â Â Â 32 Â Â Â Â Â Â 48Â Â Â Â Â Â 96 Â Â Â Â Â Â ?
...9 19 39 ? 159 319
What will come in place of the question mark (?) in the following series?
7, 19, 55, 163, 487, ?
6, 7, 16, 51, 208, ?