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प्रश्न
If 
then A = ______ and B = ______.
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उत्तर
If then A = 2 and B = 4.
Explanation:
A B
We have, × B
9 6
Here B × B = 6, therefore B can take values either 4 or 6.
For B = 4, A × B + 1 = 9
⇒ A × 4 + 1 = 9
⇒ A = 2
Hence, A = 2, B = 4
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