You save $50 in January, and each month you save $10 more than the previous month. How much have you saved by the end of April (4 months)?
Answer
$260
How to solve it
1
Jan: $50
2
Feb: $60
3
Mar: $70
4
Apr: $80
5
Total: 50 + 60 + 70 + 80 = $260
Hints
List savings for each month
January: $50, February: $60, etc.
Add all four months