Powers and Roots Practice Test 4

Question : 19 of 40

Marks: +1, -0

Find the least number of four digits which is a perfect square.

Solution:

The least number of four digits = 1000
Square root of 1000

∴

1000 = (31)^2 + 39

which is not a perfect square number
∴ The least number of four digits is 322 = 32 × 32 = 1024.

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