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A calculator has a key for squaring and another key for inverting, so if x is a displayed number, then pressing the square key will replace the x by x^2 and pressing the inverse key replace it by 1/x. if initially the number displayed is 6 and one alternately presses invert key and square key 16 times each, then the final number displayed will be

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TCS Other Question

For which of the following n is the number 274 + 22058 + 22n
option
(a) 2012
(b) 2100
(c) 2011
(d) 2020

a perfect square?
3 dice are rolled and a, b, c is obtained then what is the probability that a.b+c is even