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Worksheet: Square | Mental Mathematics for Class 8 PDF Download

Q1: Is 3528 a perfect square?

Q2: How many non-square numbers lie between 80 and 81?

Q3: Out of 745 students, the maximum is to be arranged in the school field for a P.T. display, such that the number of rows is equal to the number of columns. Find the number of rows if 16 students were left out after the arrangement.

Q4: Find the smallest number which should be divided by 1620 so as to get the quotient as a perfect square.

Q5: A man plants his orchard with 5625 trees, and arranges them so that there are as many rows as there are trees in each row. How many rows are there?

Q6: What will be the unit digit of squares of the following numbers?
(i) 2387
(ii) 1001
(iii) 252

Q7: Find the smallest perfect square divisible by 3, 4, 5 and 6.

Q8: Find a Pythagorean triplet whose one member is 28.

Q9: What is the smallest number which should be multiplied by 2028 to make it a perfect square number?

Q10: Find the square of 15 ⅔.

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