PSLE
Three men, Hal, Sam and Don had the same number of notes. Sam and Hal each had of mix of $100-notes and $20-notes. Sam had 4 $20-notes while Hal had 22 $20-notes. Don had only $100-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Sam and Hal's notes? 
3. Hal used all his $100-notes to buy a gift. Don then had $2260 more than Hal. How many $100-notes did Don have?

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

Hal had more $20-notes than Sam while Don had only the $100-notes.  

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

(b)
Difference in the number of notes of different values
= 22 - 4
= 18

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

Difference in the total value of Sam's and Hal's notes
= 18 x 80
= $1440

(c)
Value of $20-notes that Hal had left
= 22 x 20
= $440

Total value that Don had
= 2260 + 440
= $2700

Number of $100-notes that Don had
= 2700 ÷ 100
= 27

Answer(s): (a) Hal; (b) $1440; (c) 27