PSLE
Three men, Gus, Ben and Hal had the same number of notes. Ben and Gus each had of mix of $50-notes and $20-notes. Ben had 3 $20-notes while Gus had 14 $20-notes. Hal had only $50-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Ben and Gus's notes? 
3. Gus used all his $50-notes to buy a gift. Hal then had $1220 more than Gus. How many $50-notes did Hal have?

(a)
The three men had the same number of notes.
$20-notes have a lower denomination than $50-notes.

Gus had more $20-notes than Ben while Hal had only the $50-notes.  

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

(b)
Difference in the number of notes of different values
= 14 - 3
= 11

Difference in the value of $50-note and $20-note
= 50 - 20
= $30

Difference in the total value of Ben's and Gus's notes
= 11 x 30
= $330

(c)
Value of $20-notes that Gus had left
= 14 x 20
= $280

Total value that Hal had
= 1220 + 280
= $1500

Number of $50-notes that Hal had
= 1500 ÷ 50
= 30

Answer(s): (a) Gus; (b) $330; (c) 30