Level 1
Adam spends 214 h reading a book on Monday.
He continues reading the book for 135 h on Tuesday.
He finishes reading the book on Wednesday.
He spends 512 h altogether reading the book.
How long does he spend reading the book on Wednesday?
Level 2
Adam spends 12 of his monthly income on transport, 25 of it on food
and saves the rest.
If he saves $600 each month,
how much does he earn a month?