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

A. 5
B. 6
C. 8
D. 11

Answer: Option A

Explanation:

Given Expression = 25 x 14 x 11 = 5.
11 5 14

12. 

0.0169 x ? = 1.3

A. 10
B. 100
C. 1000
D. None of these

Answer: Option B

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

A.
3
4
B.
4
3
C.
4
3
D. None of these

Answer: Option C

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 ?

A. 1
B. 2
C. 3
D. None of these

Answer: Option D

Explanation:

A number ending in 8 can never be a perfect square.

15. 

The square root of 64009 is:

A. 253
B. 347
C. 363
D. 803

Answer: Option A

Explanation:

   2|64009( 253
    |4
    |----------
  45|240
    |225
    |----------
 503|  1509
    |  1509
    |----------
    |     X
    |---------- 

64009 = 253.


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