PSLE
Three men, Ari, Ned and Ken had the same number of notes. Ned and Ari each had of mix of $100-notes and $20-notes. Ned had 5 $20-notes while Ari had 11 $20-notes. Ken had only $100-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Ned and Ari's notes? 
3. Ari used all his $100-notes to buy a present. Ken then had $2680 more than Ari. How many $100-notes did Ken have?

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

Ari had more $20-notes than Ned while Ken had only the $100-notes.  

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

(b)
Difference in the number of notes of different values
= 11 - 5
= 6

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

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

(c)
Value of $20-notes that Ari had left
= 11 x 20
= $220

Total value that Ken had
= 2680 + 220
= $2900

Number of $100-notes that Ken had
= 2900 ÷ 100
= 29

Answer(s): (a) Ari; (b) $480; (c) 29