Question

Here are four digits.

8 5 3 7
a) Use three of these digits to write down the smallest possible 3-digit number.
(1)
b) Here are four different digits.
6
1
9
4.
Put one of these digits in each box to give the largest possible answer
to the subtraction. You must use each digit only once.
(1)

Answer 1

A: 357

(1) 9641

Explanation:

With A you really just want to go from the smallest number up so it would be the smallest number possible.

EX. 357 vs. 736 357 is smaller

With 1 you have to go from the highest number to lowest number to get the biggest answer possible.

Ex. 9641 vs. 1946 9641 is larger.