TCS Company Logical Reasoning Direction Sense

There is well lit room with a window and a chain is hanging from the ceiling. A man enters the room who is tall enough to reach the chains unattached end. There is a clock on the wall and nothing else in the room. The man knows his height. Find the height of the room

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TCS Other Question

Ques 23 : Choose the correct answer.
P is an integer. P>883. If P-7 is a multiple of 11, then the largest number that will always divide (P+4) (P+15) is:

Option 1 : 11
Option 2 : 121
Option 3 : 242
Option 4 : None of these

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Let C be a positive integer such that C + 7 is divisible by 5. The smallest positive integer n (>2) such that C + n2 is divisible by 5 is:

Option 1 : 4
Option 2 : 5
Option 3 : 3
Option 4 : Does not exist
7+77+777+............+7777777 23 times then what is the sum?