REVISION EXERCISE
a 256
which among the following is not a perfect square?
b. 1158
0.6084
Are the squares of the following numbers odd or even? What digit will come at the units place of the
square of the given numbers?
b. 13
e 179
d. 1326
33400
3
How many natural numbers lie between
a 18 and 19-
b. 101 and 102
4 Express each of the following as the sum of successive integers
b. 13
a. S
a 9
5. Find the square of the following numbers without actual multiplication
b. 52
a 18
6. Write a Pythagorean triplet whose
a. smallest number is 6. b. middle number is 12.
7 Find the square root of the following numbers.
a. 144 by repeated subtraction
b. 441 by prime factorisation method
c. 5625 by long division method
8. Find the smallest whole number by which:
a. 768 should be multiplied.
b. 4050 should be divided to get a perfect square.
Also find the square root of the square number so obtained.
Find the smallest perfect square divisible by
a. 4, 6 and 8
b. 12, 16 and 20
10. For a school dance programme, 1225 students are arranged in the form a big square which has
number of rows equal to the number of students in each row. Find the number of children in each
row of the square.
11. Estimate the value to the nearest whole number.
a. 156 b. 325 c. 1000
12. Find the area of a square field if its perimeter is 144 m.
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