Ari, Ike and Kai had the same number of notes. Ari and Ike had a mix of $100-notes and $10-notes. Ari had 12 $100-notes while Ike had 15 $100-notes. Kai only had $100-notes.

1. Who had the least amount of money?
2. How much more did Ike have than Ari?
3. Ike used all his $10-notes to buy a wallet. He then had $1600 less than Kai. How many $100-notes did Kai have?

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

Since Ari had the least number of $100-notes, he had the least money.

(b)
Number of more $100-notes that Ike had than Ari
= 15 - 12
= 3

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

Amount that Ike had more than Ari
= 3 x 90
= $270

(c)
Value of $100-notes that Ike had left
= 15 x 100
= $1500

Total value that Kai had
= 1500 + 1600
= $3100

Number of $100-notes that Kai had
= 3100 ÷ 100
= 31

Answer(s): (a) Ari; (b) $270; (c) 31