Question

Darren is 4 years younger than his sister Danielle. The sum of Darren’s age 4 years ago and / of Danielle’s age at that time is 7. How old is Danielle now

Answer 1

Answer: 11.

Explanation: I think it's talking about 4 years earlier so then she was 7. 4 years later she'd be 11 and Darren would be 7.