Nick received $1 from his uncle in the 1st week of school and $4 in the 2nd week. Each week, he receives $3 more than the week before.
- How much money did he received in the 10th week?
- In which week did he receive $25?
(a)
Amount that Nick received on 1st Week = $1
Amount that Nick received on 2nd Week = $9
Formula:
Amount received each week = 1 + (Week number - 1) x $3
Amount received on Week 10
= 1 + (10 - 1) x 3
= 1 + 9 x 3
= 1 + 27
= $28
(b)
Week number that Nick received $25
= [(25 - 1) ÷ 3] + 1
= (24 ÷ 3) + 1
= 8 + 1
= 9
Answer(s): (a) $28; (b) 9