PSLE
Three men, Max, Sam and Kai had the same number of notes. Sam and Max each had of mix of $50-notes and $10-notes. Sam had 17 $10-notes while Max had 22 $10-notes. Kai had only $50-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Sam and Max's notes? 
3. Max used all his $50-notes to buy a present. Kai then had $1130 more than Max. How many $50-notes did Kai have?

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

Max had more $10-notes than Sam while Kai had only the $50-notes.  

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

(b)
Difference in the number of notes of different values
= 22 - 17
= 5

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

Difference in the total value of Sam's and Max's notes
= 5 x 40
= $200

(c)
Value of $10-notes that Max had left
= 22 x 10
= $220

Total value that Kai had
= 1130 + 220
= $1350

Number of $50-notes that Kai had
= 1350 ÷ 50
= 27

Answer(s): (a) Max; (b) $200; (c) 27