PSLE
Three men, Jon, Nat and Kai had the same number of notes. Nat and Jon each had of mix of $100-notes and $10-notes. Nat had 2 $10-notes while Jon had 17 $10-notes. Kai had only $100-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Nat and Jon's notes? 
3. Jon used all his $100-notes to buy a souvenir. Kai then had $2630 more than Jon. How many $100-notes did Kai have?

(a)
The three men had the same number of notes.
$10-notes have a lower denomination than $100-notes.

Jon had more $10-notes than Nat while Kai had only the $100-notes.  

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

(b)
Difference in the number of notes of different values
= 17 - 2
= 15

Difference in the value of $100-note and $10-note
= 100 - 10
= $90

Difference in the total value of Nat's and Jon's notes
= 15 x 90
= $1350

(c)
Value of $10-notes that Jon had left
= 17 x 10
= $170

Total value that Kai had
= 2630 + 170
= $2800

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

Answer(s): (a) Jon; (b) $1350; (c) 28