PSLE
Three men, Sam, Joe and Ben had the same number of notes. Joe and Sam each had of mix of $50-notes and $10-notes. Joe had 8 $10-notes while Sam had 20 $10-notes. Ben had only $50-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Joe and Sam's notes? 
3. Sam used all his $50-notes to buy a souvenir. Ben then had $1100 more than Sam. How many $50-notes did Ben have?

(a)
The three men had the same number of notes.
$10-notes have a lower denomination than $50-notes.

Sam had more $10-notes than Joe while Ben had only the $50-notes.  

Since Sam had the most number of $10-notes, he had the least money.

(b)
Difference in the number of notes of different values
= 20 - 8
= 12

Difference in the value of $50-note and $10-note
= 50 - 10
= $40

Difference in the total value of Joe's and Sam's notes
= 12 x 40
= $480

(c)
Value of $10-notes that Sam had left
= 20 x 10
= $200

Total value that Ben had
= 1100 + 200
= $1300

Number of $50-notes that Ben had
= 1300 ÷ 50
= 26

Answer(s): (a) Sam; (b) $480; (c) 26