alleryA number ends in 9. Its square ends in:
A7
B1
C9
D3
Answer & Solution
Correct answer: B. 1
1. 9 times 9 is 81.
2. Numbers ending in 1 or 9 have squares ending in 1.
3. So the square ends in 1.
_Source: syllabus Mathematics, Chapter 6, Squares and Square Roots._
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