**Question**

5) Here are four digits.

7 3 4 9

a) Use three of these digits to write down the largest possible 3-digit number.

**[1 mark]**

b) Here are four different digits.

8 2 1 6

Put one of these digits in each box to give the smallest possible answer to the sum.

You must use each digit only once.

You must use each digit only once.

**[1 mark]**