Kai, Max and Ben had the same number of notes. Kai and Max had a mix of $50-notes and $20-notes. Max had 16 $50-notes while Kai had 19 $50-notes. Ben only had $50-notes.

1. Who had the least amount of money?
2. How much less did Max have than Kai?
3. Kai used all his $20-notes to buy a wallet. He then had $1250 less than Ben. How many $50-notes did Ben have?

(a)
The three boys had the same number of notes.
$50-notes have a higher denomination than $20-notes.

Since Max had the least number of $50-notes, he had the least money.

(b)
Number of less $50-notes that Max had than Kai
= 19 - 16
= 3

Difference in the value of $50-note and $20-note
= 50 - 20
= $30

Amount that Max had less than Kai
= 3 x 30
= $90

(c)
Value of $50-notes that Kai had left
= 19 x 50
= $950

Total value that Ben had
= 950 + 1250
= $2200

Number of $50-notes that Ben had
= 2200 ÷ 50
= 44

Answer(s): (a) Max; (b) $90; (c) 44