PSLE
Three men, Joe, Ian and Ray had the same number of notes. Ian and Joe each had of mix of $100-notes and $10-notes. Ian had 4 $10-notes while Joe had 21 $10-notes. Ray had only $100-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Ian and Joe's notes? 
3. Joe used all his $100-notes to buy a gift. Ray then had $2590 more than Joe. How many $100-notes did Ray have?

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

Joe had more $10-notes than Ian while Ray had only the $100-notes.  

Since Joe had the most number of $10-notes, he had the least money.

(b)
Difference in the number of notes of different values
= 21 - 4
= 17

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

Difference in the total value of Ian's and Joe's notes
= 17 x 90
= $1530

(c)
Value of $10-notes that Joe had left
= 21 x 10
= $210

Total value that Ray had
= 2590 + 210
= $2800

Number of $100-notes that Ray had
= 2800 ÷ 100
= 28

Answer(s): (a) Joe; (b) $1530; (c) 28