PSLE
Three men, Kit, Lee and Joe had the same number of notes. Lee and Kit each had of mix of $100-notes and $20-notes. Lee had 9 $20-notes while Kit had 24 $20-notes. Joe had only $100-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Lee and Kit's notes? 
3. Kit used all his $100-notes to buy a gift. Joe then had $2420 more than Kit. How many $100-notes did Joe have?

(a)
The three men had the same number of notes.
$20-notes have a lower denomination than $100-notes.

Kit had more $20-notes than Lee while Joe had only the $100-notes.  

Since Kit had the most number of $20-notes, he had the least money.

(b)
Difference in the number of notes of different values
= 24 - 9
= 15

Difference in the value of $100-note and $20-note
= 100 - 20
= $80

Difference in the total value of Lee's and Kit's notes
= 15 x 80
= $1200

(c)
Value of $20-notes that Kit had left
= 24 x 20
= $480

Total value that Joe had
= 2420 + 480
= $2900

Number of $100-notes that Joe had
= 2900 ÷ 100
= 29

Answer(s): (a) Kit; (b) $1200; (c) 29