Adam has some $20-notes and some $10-notes that add up to $490.
There are 5 less $10-notes than $20-notes.
- What is the value of the extra 5 $20-notes?
- What is the value of one $20-note and one $10-note?
- How many $10 notes are there?
- How many $20 notes are there?
(a)
Value of the extra 5 $20 notes
= 5 x 20
= $100
(b)
Value of one $20-note and one $10-note
= 20 + 10
= $30
(c)
Number of $10 notes
= (490 - 100) ÷ 30
= 390 ÷ 30
= 13
(d)
Number of $20 notes
= 13 + 5
= 18
Answer(s): (a) $100; (b) $30; (c) 13; (d) 18