Question
68Â Â Â 69Â Â Â Â 65Â Â Â 74Â Â Â
 ?      83    47Solution
The series is: 68 + 12 = 69 69 – 22 = 65 65 + 32 = 74 74 – 42 = 58 58 + 52 = 83 83 – 62 = 47
Find the difference between angle and its complement if the angle is three-seventh of its complement.
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