Adam has some $20-notes and some $10-notes that add up to $630.
There are 3 less $10-notes than $20-notes.
- What is the value of the extra 3 $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 3 $20 notes
= 3 x 20
= $60
(b)
Value of one $20-note and one $10-note
= 20 + 10
= $30
(c)
Number of $10 notes
= (630 - 60) ÷ 30
= 570 ÷ 30
= 19
(d)
Number of $20 notes
= 19 + 3
= 22
Answer(s): (a) $60; (b) $30; (c) 19; (d) 22