KVPY
Government Jobs Exams
The number of rectangles that can be obtained by joining four of the twelve vertices of a 12-sided regular
polygon is-
(A) 66 (B) 30 (C) 24 (D) 15
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KVPY Other Question
The length of one complete turn of a DNA double helix is-
(A) 34 Å (B) 34 nm (C) 3.4 Å (D) 3.4 μm
Let I, ω and ω2 be the cube roots of unity. The least possible degree of a polynomial, with real coefficients,
having 2ω^2, 3 + 4ω, 3 + 4ω^2 and 5 – ω – ω^2 as roots is-