Practice Questions
978 questions across 23 years of JEE Main β find and practise any topic!
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Q87.If the vectors ABβ = 3Λi + 4Λk and ACβ = 5Λi β2Λj + 4Λk are the sides of a triangle ABC, then the length of the median through A is: (1) β33 (2) β45 (3) β18 (4) β72
Q90.A number n is randomly selected from the set {1, 2, 3, β¦ . , 1000} . The probability that is an integer is βni=1 i (1) 0.331 (2) 0.333 (3) 0.334 (4) 0.332 JEE Main 2012 (12 May Online) JEE Main Previous Year Paper
Q75. a a + 1 a β1 a + 1 b + 1 c β1 Let a, b, c be such that b(a + c) β 0. If βb b + 1 b β1 + a β1 b β1 c + 1 = 0, then the c c β1 c + 1 (β1)n+2a (β1)n+1b (β1)nc value of ' n ' is (1) zero (2) any even integer (3) any odd integer (4) any integer JEE Main 2009 JEE Main Previous Year Paper