Eli, Rey and Tom had the same number of notes. Eli and Rey had a mix of $100-notes and $20-notes. Eli had 4 $100-notes while Rey had 11 $100-notes. Tom only had $100-notes.

1. Who had the least amount of money?
2. How much more did Rey have than Eli?
3. Rey used all his $20-notes to buy a wallet. He then had $2900 less than Tom. How many $100-notes did Tom have?

(a)
The three boys had the same number of notes.
$100-notes have a higher denomination than $20-notes.

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

(b)
Number of more $100-notes that Rey had than Eli
= 11 - 4
= 7

Difference in the value of $100-note and $20-note
= 100 - 20
= $80

Amount that Rey had more than Eli
= 7 x 80
= $560

(c)
Value of $100-notes that Rey had left
= 11 x 100
= $1100

Total value that Tom had
= 1100 + 2900
= $4000

Number of $100-notes that Tom had
= 4000 ÷ 100
= 40

Answer(s): (a) Eli; (b) $560; (c) 40