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a hollow cube of size 5cm is taken,with a thickness of 1cm.It is made of smaller cubes of size 1cm.If 1 face of the outer surface of the cube are painted,totally how many faces of the smaller cubes remain unpainted?

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TCS Other Question

. The bacteria have the probability of split into 3 and probability to die is 1/3rd of the total bacteria. Let the probability is P. Some of them survived with probability 1/5.Then which among the following relation is true?
a)P=1/3+1/5*3 b)P=1/5*(1/8-3)
A hare and a tortoise have a race along a circle of 100 yards diameter. The tortoise goes in one direction and the hare in the other. The hare starts after the tortoise has coverd 1/4 of its distance and that too leisurely. The hare and tortoise meet when the hare has covered only 1/8 of the distance.By what factor should the hare increse its speed so as to tie the race?