Mary saved some of her school pocket money for 4 days. She saved $2 on the first day. For the remaining 3 days, she saved $0.40 more than the previous day.
- How much money did she save in 4 days?
- Mary then spent all her savings on 2 identical notebooks. How much did each notebook cost?
(a)
Amount that Mary saved on the first day = $2
Amount that Mary saved on the second day = $2 + $0.40
Amount that Mary saved on the third day = $2 + $0.40 + $0.40
Amount that Mary saved on the fourth day = $2 + $0.40 + $0.40 + $0.40
Total amount the Mary saved in 4 days
= 4 x 2 + 6 x 0.40
= 8 + 2.40
= $10.40
(b)
Cost of each notebook
= 10.40 ÷ 2
= $5.20
Answer(s): (a) $10.40; (b) $5.20