PSLE
Three men, Don, Asa and Ned had the same number of notes. Asa and Don each had of mix of $100-notes and $20-notes. Asa had 3 $20-notes while Don had 17 $20-notes. Ned had only $100-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Asa and Don's notes? 
3. Don used all his $100-notes to buy a souvenir. Ned then had $2460 more than Don. How many $100-notes did Ned have?

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

Don had more $20-notes than Asa while Ned had only the $100-notes.  

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

(b)
Difference in the number of notes of different values
= 17 - 3
= 14

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

Difference in the total value of Asa's and Don's notes
= 14 x 80
= $1120

(c)
Value of $20-notes that Don had left
= 17 x 20
= $340

Total value that Ned had
= 2460 + 340
= $2800

Number of $100-notes that Ned had
= 2800 ÷ 100
= 28

Answer(s): (a) Don; (b) $1120; (c) 28