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Question
Madhulika thought of a number, doubled it and added 20 to it. On dividing the resulting number by 25, she gets 4. What is the number?
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Solution
Let the number be x.
According to the question,
`(2x + 20)/25 = 4`
⇒ 2x + 20 = 25 × 4
⇒ 2x + 20 = 100
⇒ 2x = 100 – 20
⇒ 2x = 80
⇒ x = `80/2`
∴ x = 40
Hence, the required number is 40.
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