PSLE
Three men, Ty, Nat and Eli had the same number of notes. Nat and Ty each had of mix of $100-notes and $20-notes. Nat had 4 $20-notes while Ty had 13 $20-notes. Eli had only $100-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Nat and Ty's notes? 
3. Ty used all his $100-notes to buy a gift. Eli then had $1840 more than Ty. How many $100-notes did Eli have?

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

Ty had more $20-notes than Nat while Eli had only the $100-notes.  

Since Ty had the most number of $20-notes, he had the least money.

(b)
Difference in the number of notes of different values
= 13 - 4
= 9

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

Difference in the total value of Nat's and Ty's notes
= 9 x 80
= $720

(c)
Value of $20-notes that Ty had left
= 13 x 20
= $260

Total value that Eli had
= 1840 + 260
= $2100

Number of $100-notes that Eli had
= 2100 ÷ 100
= 21

Answer(s): (a) Ty; (b) $720; (c) 21