Question

1A multiple by A = 9A

Answer 1

A = 6 if 1A * A  = 9A where A is a digit

Step-by-step explanation:

1A * A  = 9A

(10 + A) * A  = 9A

10A + A² = 90 + A

=> A² + 9A - 90 = 0

=> A² + 15A - 6A - 90 =0

=> A(A + 15) - 6(A + 15) = 0

=> (A - 6)(A + 15) = 0

=> A = 6

16 * 6 = 96

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