Simon received $4 from his father in the 1st week of school and $7 in the 2nd week. Each week, he receives $3 more than the week before.
- How much money did he received in the 12th week?
- In which week did he receive $25?
(a)
Amount that Simon received on 1st Week = $4
Amount that Simon received on 2nd Week = $11
Formula:
Amount received each week = 4 + (Week number - 1) x $3
Amount received on Week 12
= 4 + (12 - 1) x 3
= 4 + 11 x 3
= 4 + 33
= $37
(b)
Week number that Simon received $25
= [(25 - 4) ÷ 3] + 1
= (21 ÷ 3) + 1
= 7 + 1
= 8
Answer(s): (a) $37; (b) 8