PSLE
Three men, Ned, Kit and Max had the same number of notes. Kit and Ned each had of mix of $20-notes and $10-notes. Kit had 3 $10-notes while Ned had 13 $10-notes. Max had only $20-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Kit and Ned's notes? 
3. Ned used all his $20-notes to buy a souvenir. Max then had $450 more than Ned. How many $20-notes did Max have?

(a)
The three men had the same number of notes.
$10-notes have a lower denomination than $20-notes.

Ned had more $10-notes than Kit while Max had only the $20-notes.  

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

(b)
Difference in the number of notes of different values
= 13 - 3
= 10

Difference in the value of $20-note and $10-note
= 20 - 10
= $10

Difference in the total value of Kit's and Ned's notes
= 10 x 10
= $100

(c)
Value of $10-notes that Ned had left
= 13 x 10
= $130

Total value that Max had
= 450 + 130
= $580

Number of $20-notes that Max had
= 580 ÷ 20
= 29

Answer(s): (a) Ned; (b) $100; (c) 29