Question

Find the number of three-digit perfect squares, which end with a non-zero perfect square digit.​

Answer 1

Answer:

Let the square root of a three digit perfect squar be x then 10≤x≤31 (since 322 is a digit number and 92 is a 2 digit number)

Single digit perfect squres are 1,4 and 9

The squares which end with 1 or 4 or 9 are 11^2,12^2,13^2,17^2,18^2,19^2,21^2,22^2,23^2,27^2,28^2,29^2and31^2

There are 13 such number

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Answer 2

Answer:

Let the square root of three digit perfect square be x

so , 10≤x≤31

therefore ,

single digit perfect square = 1,4,9

the square end with 1,4,9 are 11, 12, 13, 17, 18 , 19 , 21 , 22 , 23 , 27 , 28 ,29 and 31 .

Step-by-step explanation:

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