PSLE
Three men, Tim, Ned and Ben had the same number of notes. Ned and Tim each had of mix of $20-notes and $10-notes. Ned had 8 $10-notes while Tim had 18 $10-notes. Ben had only $20-notes.

1. Of the three men, who had the least money? 
2. What was the difference in the total value of Ned and Tim's notes? 
3. Tim used all his $20-notes to buy a gift. Ben then had $300 more than Tim. How many $20-notes did Ben have?

(a)
The three men had the same number of notes.
$10-notes have a lower denomination than $20-notes.

Tim had more $10-notes than Ned while Ben had only the $20-notes.  

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

(b)
Difference in the number of notes of different values
= 18 - 8
= 10

Difference in the value of $20-note and $10-note
= 20 - 10
= $10

Difference in the total value of Ned's and Tim's notes
= 10 x 10
= $100

(c)
Value of $10-notes that Tim had left
= 18 x 10
= $180

Total value that Ben had
= 300 + 180
= $480

Number of $20-notes that Ben had
= 480 ÷ 20
= 24

Answer(s): (a) Tim; (b) $100; (c) 24