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Olympiad-Math
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Class 6
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Math
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Ratio and Proportion
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Q)
Angle AOD=90. Angle AOC=120. Angle BOD =120. Find AOB.
https://drive.google.com/file/d/0B_UYTZVc4r4mMERjb3ZUcFh2NVE/view?usp=sharing
( A ) 20
( B ) 45
( C ) 60
( D ) 30
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