You can create 17 using 1, 2, 3, and 4 each only once with the following equation:

$(4 \times 4) + (3 \times 2) - 1 = 17$

Explanation:

1. $4 \times 4 = 16$
2. $3 \times 2 = 6$
3. Subtract $1$ from $16 + 6 = 22$, so $22 - 1 = 17$

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Here are 5 related problems you can try:

1. Can you make 18 using 1, 2, 3, and 4?
2. What is another way to make 17 using these numbers?
3. Create 15 using the same numbers once each.
4. Find a way to make 20 with 1, 2, 3, and 4.
5. Is it possible to make 19 with these numbers?

Tip: Try exploring combinations of multiplication, addition, and subtraction to find new results!