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In a class in Jaipur, students stand in a rectangular grid. The teacher says only a prime number of students cannot be arranged in a rectangle with both sides greater than 1.
Which class size below MUST be arranged in just a single row or single column?

Class 6Prime and Composite NumbersPlaying with Numbers
  • A36
  • B40
  • C41
  • D45

Step-by-Step Solution

41 is prime, so its only factors are 1 and 41 — it cannot form a rectangle with both sides greater than 1. 36, 40 and 45 are composite.
Answer: C) 41

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