A pineapple costs Rs 7 each. A watermelon costs Rs 5 each. X spends Rs 38 on these fruits. The number of pineapples purchased is
Question and options
A pineapple costs Rs 7 each. A watermelon costs Rs 5 each. X spends Rs 38 on these fruits. The number of pineapples purchased is
- 2
- 3
- 4
- Data inadequate
Answer and explanation
Correct answer: C - 4
Solve 7p + 5w = 38 in non-negative integers. Only p = 4, w = 2 works (28 + 10 = 38); p = 0, 1, 2, 3, 5 leave remainders not divisible by 5. So 4 pineapples were bought, a unique answer, so the data is adequate.
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CUSAT CAT LLM
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