Zara received $50 more pocket money than Dana each month. Both of them spent $100 per month and saved the rest. After a few months, Zara saved $1710 but Dana only saved $1260.

1. What was Zara's monthly pocket money?
2. Dana wanted to save a total of $2100. How many more months did she need in order to save this amount?

(a)
Total amount that Zara saved more than Dana
= 1710 - 1260
= $450

Number of months taken for each of them to save their amounts
= 450 ÷ 50
= 9

Amount that Zara saved each month
= 1710 ÷ 9
= $190

Zara's monthly pocket money
= 190 + 100
= $290

(b)
Dana's monthly pocket money
= 290 - 50
= $240

Amount that Dana saved each month
= 240 - 100
= $140

Remaining amount that Dana needed to save
= 2100 - 1260
= $840

Number of more months that Dana needed to save the remaining $840
= 840 ÷ 140
= 6

Answer(s): (a) $290; (b) 6