PSLE
Three men, Gus, Ari and Ned had the same number of notes. Ari and Gus each had of mix of $50-notes and $10-notes. Ari had 3 $10-notes while Gus had 14 $10-notes. Ned had only $50-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Ari and Gus's notes? 
3. Gus used all his $50-notes to buy a present. Ned then had $810 more than Gus. How many $50-notes did Ned have?

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

Gus had more $10-notes than Ari while Ned had only the $50-notes.  

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

(b)
Difference in the number of notes of different values
= 14 - 3
= 11

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

Difference in the total value of Ari's and Gus's notes
= 11 x 40
= $440

(c)
Value of $10-notes that Gus had left
= 14 x 10
= $140

Total value that Ned had
= 810 + 140
= $950

Number of $50-notes that Ned had
= 950 ÷ 50
= 19

Answer(s): (a) Gus; (b) $440; (c) 19