PSLE
Three boys, Tim, Max and Kai had the same number of notes. Tim and Max each had of mix of $5-notes and $2-notes. Tim had 7 $2-notes while Max had 22 $2-notes. Kai had only $5-notes.

1. Of the three boys, who had the most money? 
2. What was the difference in the total value of Tim and Max's notes? 
3. Max used all his $5-notes to buy a present. He then had $106 less than Kai. How many $5-notes did Kai have?

(a)
The three boys had the same number of notes.
$2-notes have a lower denomination than $5-notes.

Since Kai had only $5-notes, he had the most money.

(b)
Difference in the number of notes of different values
= 22 - 7
= 15

Difference in the value of $5-notes and $2-notes
= 5 - 2
= $3

Difference in the total value of Tim's and Max's notes
= 15 x 3
= $45

(c)
Value of $2-notes that Max had left
= 22 x 2
= $44

Total value that Kai had
= 106 + 44
= $150

Number of $5-notes that Kai had
= 150 ÷ 5
= 30

Answer(s): (a) Kai; (b) $45; (c) 30