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3 x 1 + 1² = 4 4 x 2 + 2² = 12 12 x 3 + 3² = 45 45 x 4 + 4² = 196 196 x 5 + 5² = 1105
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A seller marked an article 25% above its cost price and sold it after allowing 10% discount. If he made a profit of Rs. 25, then find the difference bet...