Multiple choice If A 1 + 1 B = B 0, then the value of A and B is A = 7 , B = 9 A = 0 , B = 1 A = 1 , B = 0 A = 9 , B = 7 Reveal answer Fill a bubble to check yourself A Correct answer Explanation (10A + 1) + (10 + B) = 10B + 0. Simplifying: 10A + B + 11 = 10B. 10A + 11 = 9B. Testing A=7: 70 + 11 = 81, so 9B = 81, B = 9. This matches.