Question

which are the digits the square number can have at units place​

Answer 1

Answer:

Step-by-step explanation:

If unit digit of a number is 3 then it can't be a perfect square. – If unit digit of a perfect square is 4 then ten's digit has to be Even. E.g. 64, 144, 484 all are Perfect Square having unit digit 4 and tens digit is even. E.g. 25, 225, 625,1225 all are Perfect Square having unit digit 5 and tens digit is 2.

Answer 2

hey mate !

square roots of first 10 numbers

$1 - 1 \\ 2 - 4 \\ 3 - 9 \\ 4 - 16 \\ 5 - 25 \\ 6 - 36 \\ 7 - 49 \\ 8 - 64 \\ 9 - 81 \\ 10 - 100$

10 from the above we can see that the ending numbers of the perfect square roots can be 1 4 5 6 9 0

Thus it can be concluded that

If a number ends with 2, 3, 7 or 8 then it can’t be perfect square.

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