PSLE
Three men, Lon, Tom and Roy had the same number of notes. Tom and Lon each had of mix of $100-notes and $50-notes. Tom had 6 $50-notes while Lon had 20 $50-notes. Roy had only $100-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Tom and Lon's notes? 
3. Lon used all his $100-notes to buy a gift. Roy then had $2000 more than Lon. How many $100-notes did Roy have?

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

Lon had more $50-notes than Tom while Roy had only the $100-notes.  

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

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

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

Difference in the total value of Tom's and Lon's notes
= 14 x 50
= $700

(c)
Value of $50-notes that Lon had left
= 20 x 50
= $1000

Total value that Roy had
= 2000 + 1000
= $3000

Number of $100-notes that Roy had
= 3000 ÷ 100
= 30

Answer(s): (a) Lon; (b) $700; (c) 30