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प्रश्न
13 and 31 is a strange pair of numbers such that their squares 169 and 961 are also mirror images of each other. Find two more such pairs.
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उत्तर
(13)2 = 169 and (31)2 = 961
Similarly, two such number can be 12 and 21
∴ (12)2 = 144 and (21)2 = 441
And 102, 201
(102)2 = 102 × 102 = 10404
And (201)2 = 201 × 201 = 40401
102
× 102
204
1020
10404
201
× 201
201
4020
40401
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