PSLE
Three boys, Abe, Ned and Jon had the same number of notes. Abe and Ned each had of mix of $10-notes and $2-notes. Abe had 14 $2-notes while Ned had 21 $2-notes. Jon had only $10-notes.

1. Of the three boys, who had the most money? 
2. What was the difference in the total value of Abe and Ned's notes? 
3. Ned used all his $10-notes to buy a souvenir. He then had $228 less than Jon. How many $10-notes did Jon have?

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

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

(b)
Difference in the number of notes of different values
= 21 - 14
= 7

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

Difference in the total value of Abe's and Ned's notes
= 7 x 8
= $56

(c)
Value of $2-notes that Ned had left
= 21 x 2
= $42

Total value that Jon had
= 228 + 42
= $270

Number of $10-notes that Jon had
= 270 ÷ 10
= 27

Answer(s): (a) Jon; (b) $56; (c) 27