PSLE
Three men, Sam, Luc and Rio had the same number of notes. Luc and Sam each had of mix of $100-notes and $20-notes. Luc had 14 $20-notes while Sam had 20 $20-notes. Rio had only $100-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Luc and Sam's notes? 
3. Sam used all his $100-notes to buy a souvenir. Rio then had $2100 more than Sam. How many $100-notes did Rio have?

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

Sam had more $20-notes than Luc while Rio had only the $100-notes.  

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

(b)
Difference in the number of notes of different values
= 20 - 14
= 6

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

Difference in the total value of Luc's and Sam's notes
= 6 x 80
= $480

(c)
Value of $20-notes that Sam had left
= 20 x 20
= $400

Total value that Rio had
= 2100 + 400
= $2500

Number of $100-notes that Rio had
= 2500 ÷ 100
= 25

Answer(s): (a) Sam; (b) $480; (c) 25