Question

How many four-digit perfect square numbers have 4,5 or 6 in their units place? pls give me correct ans pls ​

Answer 1

Answer:

6 ; 5 ; 6

Step-by-step explanation:

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Answer 2

Answer:

45

Step-by-step explanation:

10 is the lowest number whose perfect square is 4 digit and 99 is the highest

and there are 18 numbers with 4 in their units place they are perfect squares:12,18,22,28,32,38,42,48,52,58,62,68,72,78,82,88,92,98(i.e. numbers ending with 2/8 squares)

There are 9 numbers with 5 in their units place (i.e numbers ending with 5 squares)

There are 18 numbers with 6 in their units place(i.e. the numbers ending with 4/6 squares

Total = 18+18+9 = 45