Elitmus Exam

If x,y and z are odd no’s, then 1/8((x^2+y^2)*z^2) is always i) odd, ii)even, iii)can be odd or even iv) cannot be determined

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Elitmus Other Question

5 boxes are there viz. 1,2,3,4,5. We have blue balls and red balls. What is the probability of filling the boxes with no two consecutive blue balls? Santa and Banta started playing a game. Among 3,4,5,6,7 they started making no sequences in decreasing way. Like 75364 or 76354. So what is the probability of Santa making bigger no’s than Banta