Glen received $2 from his mother in the 1st week of school and $6 in the 2nd week. Each week, he receives $4 more than the week before.
- How much money did he received in the 18th week?
- In which week did he receive $26?
(a)
Amount that Glen received on 1st Week = $2
Amount that Glen received on 2nd Week = $17
Formula:
Amount received each week = 2 + (Week number - 1) x $4
Amount received on Week 18
= 2 + (18 - 1) x 4
= 2 + 17 x 4
= 2 + 68
= $70
(b)
Week number that Glen received $26
= [(26 - 2) ÷ 4] + 1
= (24 ÷ 4) + 1
= 6 + 1
= 7
Answer(s): (a) $70; (b) 7