Interview Maths Puzzle Numerical Ability

Let play a game of Russian roulette. You are tied to your chair and can get up. Here a gun. Here the barrel of the gun, six chambers, all empty.
Now watch me as I put two bullets in the gun. I close the barrel and spin it. Should I spin the barrel or not so that you could be alive. Luckily you survived.
Now again i am pointing it at you. Should I spin the barrel or not so that you could be alive.

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Interview Other Question

Which is the smallest number which has one zero and zero one....... What does the hexanumber E78 in radix 7?
a) 12455
b) 14153
c) 14256
d) 13541
e) 131112