EduSahara™ Assignment
Name : Squares and Square Roots
Chapter : Powers and Roots
Grade : ICSE Grade VII
License : Non Commercial Use
Question
1
1.
Find the
square root
of
4
(i)
0
(ii)
5
(iii)
2
(iv)
3
(v)
1
Question
2
2.
Find the
square root
of
25
4
(i)
5
4
(ii)
7
2
(iii)
5
(iv)
3
2
(v)
5
2
Question
3
3.
Which of the following is a perfect square?
(i)
679
(ii)
574
(iii)
225
(iv)
1765
(v)
224
Question
4
4.
Which of the following is not a perfect square?
(i)
441
(ii)
322
(iii)
169
(iv)
9
Question
5
5.
What is the unit place digit in the square of 1?
(i)
5
(ii)
7
(iii)
4
(iv)
1
(v)
0
Question
6
6.
If a number has 3 zeros at the end, its square has how many zeros?
(i)
3
(ii)
5
(iii)
8
(iv)
6
(v)
7
Question
7
7.
Find the smallest perfect square which is divisible by each of the numbers 10,15,18
(i)
900
(ii)
902
(iii)
1351
(iv)
1800
Question
8
8.
How many digits are there in the square root of 9604?
(i)
1
(ii)
5
(iii)
2
(iv)
0
(v)
3
Question
9
9.
How many digits are there in the square root of 497025?
(i)
6
(ii)
0
(iii)
4
(iv)
2
(v)
3
Question
10
10.
Find the least number that must be subtracted from 445 to get a perfect square?
(i)
3
(ii)
1
(iii)
4
(iv)
5
(v)
7
Question
11
11.
Find the least number that must be added to 2257 to get a perfect square?
(i)
47
(ii)
45
(iii)
50
(iv)
48
(v)
46
Question
12
12.
Find the smallest 2 digit number which is a perfect square?
(i)
19
(ii)
14
(iii)
17
(iv)
16
(v)
15
Question
13
13.
Find the greatest 2 digit number which is a perfect square?
(i)
84
(ii)
82
(iii)
80
(iv)
81
(v)
78
Question
14
14.
Find the smallest 3 digit number which is a perfect square?
(i)
102
(ii)
100
(iii)
99
(iv)
97
(v)
101
Question
15
15.
Find the greatest 3 digit number which is a perfect square?
(i)
960
(ii)
959
(iii)
964
(iv)
962
(v)
961
Question
16
16.
Find the square root of
72.30
(i)
10.5
(ii)
6.5
(iii)
9.5
(iv)
7.5
(v)
8.5
Question
17
17.
Find the square root of
287.400
(i)
15.953
(ii)
14.953
(iii)
16.953
(iv)
18.953
(v)
17.953
Question
18
18.
Find the square root of
7812.3000
(i)
90.3872
(ii)
89.3872
(iii)
88.3872
(iv)
87.3872
(v)
86.3872
Question
19
19.
The smallest number by which 1058 must be multiplied so that the product is a perfect square is?
(i)
(-1)
(ii)
3
(iii)
2
(iv)
5
(v)
1
Question
20
20.
The smallest number by which 243 must be divided so that the quotient is a perfect square is?
(i)
3
(ii)
2
(iii)
4
(iv)
1
(v)
5
Question
21
21.
√
169
25
=
(i)
3
(ii)
13
3
(iii)
11
5
(iv)
13
7
(v)
13
5
Question
22
22.
√
0.4900
=
(i)
0.8
(ii)
0.6
(iii)
0.9
(iv)
0.7
(v)
0.07
Question
23
23.
Simplify
√
25
−
√
81
√
100
+
√
36
=
(i)
(
-1
8
)
(ii)
(
-2
9
)
(iii)
(
-3
8
)
(iv)
(
-1
4
)
(v)
(
-2
7
)
Assignment Key
1) (iii)
2) (v)
3) (iii)
4) (ii)
5) (iv)
6) (iv)
7) (i)
8) (iii)
9) (v)
10) (iii)
11) (i)
12) (iv)
13) (iv)
14) (ii)
15) (v)
16) (v)
17) (iii)
18) (iii)
19) (iii)
20) (i)
21) (v)
22) (iv)
23) (iv)
