Question

A woman worked for 30 years before retiring. In which decade did she start working if she retired in 2020?

a) 1960s
b) 1970s
c) 1980s
d) 1990s

Answer 1

The woman started working in the 1960s.

Step-by-step explanation:

The woman started working in the 1960s if she retired in 2020. This can be determined by subtracting 30 years from 2020, which gives us the year 1990. Since she worked for 30 years, she must have started working in the decade before that, which is the 1960s.