PSLE
Three men, Eli, Jon and Ned had the same number of notes. Jon and Eli each had of mix of $50-notes and $10-notes. Jon had 5 $10-notes while Eli had 17 $10-notes. Ned had only $50-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Jon and Eli's notes? 
3. Eli used all his $50-notes to buy a souvenir. Ned then had $1230 more than Eli. How many $50-notes did Ned have?

(a)
The three men had the same number of notes.
$10-notes have a lower denomination than $50-notes.

Eli had more $10-notes than Jon while Ned had only the $50-notes.  

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

(b)
Difference in the number of notes of different values
= 17 - 5
= 12

Difference in the value of $50-note and $10-note
= 50 - 10
= $40

Difference in the total value of Jon's and Eli's notes
= 12 x 40
= $480

(c)
Value of $10-notes that Eli had left
= 17 x 10
= $170

Total value that Ned had
= 1230 + 170
= $1400

Number of $50-notes that Ned had
= 1400 ÷ 50
= 28

Answer(s): (a) Eli; (b) $480; (c) 28