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A number is decreased by 10% and then increased by 10%. The number so obtained is 10 less than the original number. What was the original number?

Mathematics

ScanSolve AI Answer

Answer

1000\text{1000}

Step-by-step solution

5 steps
  1. मान लीजिए कि मूल संख्या xx है।

  2. संख्या को 10%10\% कम करने पर, नई संख्या होगी

    x−0.10x=0.90xx - 0.10x = 0.90x
  3. अब, इस नई संख्या (0.90x0.90x) को 10%10\% बढ़ाया जाता है। तो, अंतिम संख्या होगी

    0.90x+(0.10×0.90x)0.90x + (0.10 \times 0.90x) 0.90x+0.09x=0.99x0.90x + 0.09x = 0.99x
  4. प्रश्न के अनुसार, प्राप्त संख्या (0.99x0.99x) मूल संख्या (xx) से 10 कम है। इसे समीकरण के रूप में लिखें

    0.99x=x−100.99x = x - 10
  5. xx के लिए समीकरण को हल करें

    10=x−0.99x10 = x - 0.99x 10=0.01x10 = 0.01x x=100.01x = \frac{10}{0.01} x=10×100x = 10 \times 100 x=1000x = 1000

    मूल संख्या 1000 है।

    सही विकल्प है (d)।

    The final answer is 1000\text{1000}

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