Question
From the top of a multi-storey building, the angle of
depression to the top of a smaller building (which is 20 meters tall) is 45°. The distance between the two buildings is 15 meters. Find the height of the multi-storey building.Solution
ATQ, Let AB be the multi- storey building and CD the small building. In triangle APC 
Therefore, the total height AB = AP+BP = 15+20 = 35 meters.
1056Â Â Â Â Â 264Â Â Â Â Â Â 132 Â Â Â Â Â Â 33Â Â Â Â Â Â ? Â Â Â Â Â Â 4.125
...What should come in place of (?) question mark in the following number series.
7, 14, 30, 66, 146, ?
16Â Â Â 25Â Â Â 36Â Â Â 49Â Â Â 64Â Â Â Â ?
What will come in place of the question mark (?) in the following series?
63, 92, ?, 158, 195, 224
306, 272, 240, ?, 182, 156
33Â Â Â 41Â Â Â 25Â Â Â 49Â Â Â 17Â Â Â Â ?
6    11    32    111    ?   2345   14100
...5, 12, 24, 36, 52, ?
312, 302, 282, ?, 212, 162
What value should come in the place of (?) in the following number series?
1.5, 2.5, 4, 6, ?, 11.5
