Sam received $2 from his uncle in the 1st week of school and $4 in the 2nd week. Each week, he receives $2 more than the week before.
- How much money did he received in the 16th week?
- In which week did he receive $16?
(a)
Amount that Sam received on 1st Week = $2
Amount that Sam received on 2nd Week = $15
Formula:
Amount received each week = 2 + (Week number - 1) x $2
Amount received on Week 16
= 2 + (16 - 1) x 2
= 2 + 15 x 2
= 2 + 30
= $32
(b)
Week number that Sam received $16
= [(16 - 2) ÷ 2] + 1
= (14 ÷ 2) + 1
= 7 + 1
= 8
Answer(s): (a) $32; (b) 8