Question

Here are four digit cards. 1 2 3 4 Show all the different two-digit numbers that are bigger than 30 that you can make using these cards. You can use the cards more than once.

Answer 1

look below

Explanation:

bigger than thirty

the first number has to be a 3 or 4

2×possibility of units

any card will fit in the last becuase you can use the card more than once

2×4=8 possibilities

31,32,33,34,41,42,43,44

Answer 2

34, 43, 42, 41, 31, 32, 33, 44

yea that's about it I could think of