Question

which of the following four digit numbers is a perfect square such that the first two digits and the last two digits considered separately also represent perfect square? and why (A)3616 (B)6436 (C)8164 (D)1681

Answer 1

Answer:

1681 (d)

Step-by-step explanation:

The correct answer is option D

1681 is a perfect square of 41

first two digits 16 is a perfect square of 4

last two digits 81 is a perfect square of 9.

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