What number do you guess?
100
It is too big.
What number do you guess?
90
It is too big.
What number do you guess?
80
It is too big.
What number do you guess?
70
It is too small.
What number do you guess?
75
It is too small.
What number do you guess?
76
It is too small.
What number do you guess?
78
Bingo!