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Past Year MCQ (Maths Standard)
Past Year MCQ (Maths Standard)
Last updated at March 16, 2023 by Teachoo
Question 6 If n is a natural number, then 2(5n + 6n) always ends with (a) 1 (b) 4 (c) 3 (d) 2Now, 5n always ends with 5 6n always ends with 6 Thus, (5n + 6n) always ends with 5 + 6 = 11 Thus, 2 × (5n + 6n) always ends with 2 × 11 = 22 i.e. it always ends with 2 So, the correct answer is (d)