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A digital signboard in Delhi can show only perfect squares.
The owner wants a 4-digit number that is a perfect square, ends in 6, and whose thousands digit is 1, and whose tens digit is 9.
Which number can the board show?

Class 8Properties of Square NumbersSquares and Roots
  • A1296
  • B1156
  • C1024
  • D1764

Step-by-Step Solution

4-digit squares with thousands digit 1: . The one ending in 6 AND having tens digit 9 is . 1156 ends in 6 but its tens digit is 5, so it is ruled out. 1024 ends in 4; 1764 has thousands digit 1 but ends in 4.
Answer: A) 1296

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