PSLE
Three men, Nat, Don and Lee had the same number of notes. Don and Nat each had of mix of $100-notes and $50-notes. Don had 10 $50-notes while Nat had 16 $50-notes. Lee had only $100-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Don and Nat's notes? 
3. Nat used all his $100-notes to buy a gift. Lee then had $1300 more than Nat. How many $100-notes did Lee have?

(a)
The three men had the same number of notes.
$50-notes have a lower denomination than $100-notes.

Nat had more $50-notes than Don while Lee had only the $100-notes.  

Since Nat had the most number of $50-notes, he had the least money.

(b)
Difference in the number of notes of different values
= 16 - 10
= 6

Difference in the value of $100-note and $50-note
= 100 - 50
= $50

Difference in the total value of Don's and Nat's notes
= 6 x 50
= $300

(c)
Value of $50-notes that Nat had left
= 16 x 50
= $800

Total value that Lee had
= 1300 + 800
= $2100

Number of $100-notes that Lee had
= 2100 ÷ 100
= 21

Answer(s): (a) Nat; (b) $300; (c) 21