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Question

Rahul purchased 7 dvds each of which costs 17. He gave a five hundred rupee note to the shopkeeper. The amount returned to him is divisible by?


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Solution

Given that Rahul purchased 7 dvds

Cost of 1 dvd =17

Cost of 7 dvds =7×17=119

He gave a five hundred rupee note to the shopkeeper.

Therefore, the amount the shopkeeper returned =500119=381

Now

381=3×127

Here both 3and 127 are prime numbers.

Hence, the amount returned to him is divisible by both 3 and 127.


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