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The sum of the opposite angles in cyclic quadrilateral is 180°. ∠A = 1x ∠B = 4x ∠C = 5x ∠A + ∠C = 180° 1x + 5x = 180° x = 30° ∠B = 4 × 30° = 120° ∠B + ∠D = 180° 120° + ∠D = 180° ∠D = 60°
What will come in place of the question mark (?) in the following series?
3.5, 9.5, 27.5, 81.5, 243.5, 729.5, ?
244, 179, 129, 92, 66, ?
23 40 67 104 ? 208
...110, 156, 212, ?, 354, 440
230192 172 ? 122 100
...226 231 466 ? 5606 28031
500, 250, 750, 375, 1125, 562.5, ?
119 × 13 + 150/100 × 850 =?
17, 9, ?, 13.5, 25, 65
17 18 14 ? 7 32
...