allery25 can be written as 1+3+5+7+9. This shows 25 is a:
APerfect cube
BTriangular number
CPerfect square
DPrime number
Answer & Solution
Correct answer: C. Perfect square
1. A square is the sum of successive odd numbers from 1.
2. Five odd numbers add to 25.
3. So 25 is a perfect square, 5 squared.
_Source: syllabus Mathematics, Chapter 6, Squares and Square Roots._
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