ITPEC IP October 2023 Question 5
ITPEC IP October 2023 — Question 5 of 100
The right-hand unit outputs B1 = 3. For each unit, output B1 is its second input A2, and output B2 is A1 mod A2.
The left unit receives A1 = 15 and A2 = 6, so it produces:
- B1 = 6
- B2 = 15 mod 6 = 3
These outputs become the right unit's inputs: A1 = 6 and A2 = 3. Since that unit copies its A2 to B1, its B1 is 3.
Answer (b)
Why not others:
- 0 would be the right unit's B2 because 6 mod 3 = 0
- 6 is the first unit's B1 and the second unit's A1
- 15 is only the original A1 input
Key rule: Trace every wire in order; do not confuse the second unit's B1 with its remainder output B2.
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