Question
The ratio between the number of sides of two regular
polygon is 2:5 and the ratio between their interior angles is 10:12. The number of sides of these polygons are respectively:Solution
Let number of side of first polygon = 2x & that of 2nd polygon = 5x ; then ratio of their interior angles = I(1): I(2) = 10:12 or (180 - E1):(180-E2) = 10:12 or 2160 - 12E1 = 1800 - 10E2 or 12E1 - 10E2 = 2160 - 1800 = 360 or 12(360/2x) - 10(360/5x) = 360 or 2160/x - 720/x = 360 or 1440/x = 360 or x = 1440/360 = 4
4, 17, 62, 317, ?, 13267
If   314     306      x      269       394    178    1480
Then, 1/3 x + 2x - x = ?
...40 30 20 ? 7.5 4.375
9256Â Â Â Â Â Â 6844Â Â Â Â Â Â 4888Â Â Â Â Â Â 3350Â Â Â Â Â 2152Â Â Â Â Â Â 1276
...49Â Â Â 84Â Â Â 119Â Â Â 154Â Â Â 189Â Â Â ?
122, 116, 125, 119, 128, ?
1 2 9 ? 65 126
...25, 200, 40, ?, 64, 512
A series is 4, 5, 17, 88, 620, 5585
If another series a, b, 23, d, e, f follows the same pattern as the given number series, then find the approx...
Select the number from among the given options that can replace the question mark (?) in the following series.
2, 6, 12, 20, ?, ?
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