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Solve 2011 CBSE : Mathematics Set I question paper
1. The roots of the equation x2-3x-m(m+3) = 0, where m is a constant are
(A) m, m+3
(B) -m, m+3
(C) m, -(m+3)
(D) -m, -(m+3)
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2. If the common difference of an A.P. is 3, then a20-a15 is
(A) 5
(B) 3
(C) 15
(D) 30
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5. The perimeter (in cm) of a square circumscribing a circle of radius a cm, is
(A) 8a
(B) 4a
(C) 2a
(D) 16a
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