Question

C++ Choose any of the following values can be stored in an int variable.
1) 77
2) 7.7
3) -77
4) 0
5) 7/10
6) .0004

Answer 1

OK? What part of this are you unsure of?

Answer 2

77, 0 , -77 are integers and so they can be stored in an int variable

Answer 3

1), 3), 4) are integers to be stored in an int

Answer 4

And if you are unsure how they answered that so adeptly, take a look at a variable type declaration chart:
http://www.cplusplus.com/doc/tutorial/variables/

Under "Fundamental data types" it goes over what makes what.