Tirupati sells a calculator to Ashok. Ashok offered him a sum of money for which he refused as being 13% below the value of the calculator.…

Let the value of the calculator be ‘x’, then according to the question,

105% of x – 87% of x = 45

$(\Rightarrow x \times \frac{{105}}{{100}} - x \times \frac{{87}}{{100}} = 45)$

⇒ x × (18/100) = 45

⇒ x = (45 × 100)/18 = Rs 250.

Hence, the required value of the calculator is Rs 250.