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Aptitude - Square Root and Cube Root

Exercise : Square Root and Cube Root - General Questions
11.
625 x 14 x 11 is equal to:
11 25 196
5
6
8
11
Answer: Option
Explanation:
Given Expression = 25 x 14 x 11 = 5.
11 5 14
12.

0.0169 x ? = 1.3

10
100
1000
None of these
Answer: Option
Explanation:

Let 0.0169 x x = 1.3.

Then, 0.0169x = (1.3)2 = 1.69

x = 1.69 = 100
0.0169

13.
3 - 1 2 simplifies to:
3
3
4
4
3
4
3
None of these
Answer: Option
Explanation:

3 - 1 2 = (3)2 + 1 2 - 2 x 3 x 1
3 3 3

= 3 + 1 - 2
3

= 1 + 1
3

= 4
3

14.
How many two-digit numbers satisfy this property.: The last digit (unit's digit) of the square of the two-digit number is 8 ?
1
2
3
None of these
Answer: Option
Explanation:
A number ending in 8 can never be a perfect square.
15.
The square root of 64009 is:
253
347
363
803
Answer: Option
Explanation:
   2|64009( 253
    |4
    |----------
  45|240
    |225
    |----------
 503|  1509
    |  1509
    |----------
    |     X
    |----------

64009 = 253.

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