PSLE
Three boys, Sam, Ray and Ian had the same number of notes. Sam and Ray each had of mix of $10-notes and $2-notes. Sam had 14 $2-notes while Ray had 20 $2-notes. Ian had only $10-notes.

1. Of the three boys, who had the most money? 
2. What was the difference in the total value of Sam and Ray's notes? 
3. Ray used all his $10-notes to buy a souvenir. He then had $240 less than Ian. How many $10-notes did Ian have?

(a)
The three boys had the same number of notes.
$2-notes have a lower denomination than $10-notes.

Since Ian had only $10-notes, he had the most money.

(b)
Difference in the number of notes of different values
= 20 - 14
= 6

Difference in the value of $10-notes and $2-notes
= 10 - 2
= $8

Difference in the total value of Sam's and Ray's notes
= 6 x 8
= $48

(c)
Value of $2-notes that Ray had left
= 20 x 2
= $40

Total value that Ian had
= 240 + 40
= $280

Number of $10-notes that Ian had
= 280 ÷ 10
= 28

Answer(s): (a) Ian; (b) $48; (c) 28