Let A be the set {1, 2, 3, 4}. Which ordered pairs are in the relation?

Question

Let A be the set {1, 2, 3, 4}. Which ordered pairs are in the relation R = {(a, b) | a + b is less than or equal to 5} where a, b ε A

Answer 1

(1,1), (1,2), (1,3), (1,4), (2,1), (2,2), (2,3), (3,1), (3,2), (4,1)

Answer 2

Keep those logic people out of algebra. We have enough problems with the math.

Basically, we have the numbers 1,2,3,and 4. If we select one number out of this set, say 2, we want to know which other numbers we can pick so that the sum of the two numbers is less than 5.

To make a long story short, there are 12 pairs. Those that are MORE than 5 are 2,4 and 4,2 -
3,4 and 4,3. All others meet the relation criteria.

Answer 3

Find the pairs of numbers from the set such that when you add them up they are equal to 5 or less.
(1,2) (2,1) (1,3) (3,1) (1,4) (4,1) (2,3) (3,2)

Answer 4

My Brain hurts i can't add up at the best of times.