Question

In how many ways can a 12- question true and false exam be answered?

Answer 1

4096

Explanation:

Since there are 12 questions, and each question can be answered in 2 ways then:

1st question can be answered in 2 ways.
2nd question can be answered in 2 ways.

The 2 questions can be answered in `2 xx 2` ways.
The 3 questions can be answered in `2xx2xx2` ways and so on.

So we have:

`2xx2xx2xx2xx2xx2xx2xx2xx2xx2xx2xx2=> 2^12= 4096`