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There are 200 questions in a 3 h examination. Among 200 questions, 50 are from Mathematics, 100 are from GK and 50 are from Science. Ram spent twice as much time on each Mathematics question as for each other question. How many minutes did he spend on Mathematics questions ?

Let a_1,a_2,a_3…………., a_n be positive numbers in G.P. For each n let A_n, G_n, H_n be respectively the arithmetic mean geometric mean and harmonic mean of a_1,a_2,……..,a_n On the basis of above information answer the following question: A_k,G_k,H_k are in (A) A.P. (B) G.P. (C) H.P. (D) none of these

The National Insignia (राष्ट्रीय प्रतीक चिन्ह)|Current Affairs & Static GK - Practice Set (Questions-प्रश्न)|OMR

What will come in place of the question mark(?) in the following series of English alphabet? AE CG EI GK ?