Square Roots and Cube Roots Questions

Q:

The cube root of .000216 is:

A) .6 B) .06
C) 77 D) 87
 
Answer & Explanation Answer: B) .06

Explanation:

{\color{Blue}(.000216) ^{\frac{1}{3}}=\left ( \frac{216}{10^{6}} \right )^{\frac{1}{3}}} {\color{Blue} =\left [ \frac{6\times 6\times 6}{10^{2}\times 10^{2}\times 10^{2}} \right ]^{\frac{1}{3}}} {\color{Blue} =\left [ \frac{6}{10^{2}} \right ]} {\color{Blue} =0.06}

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31 5589
Q:

A group of students decided to collect as many paise from each member of group as is the number of members. If the total collection amounts to Rs. 59.29, the number of the member is the group is:

A) 57 B) 67
C) 77 D) 87
 
Answer & Explanation Answer: C) 77

Explanation:

Money collected = (59.29 x 100) paise = 5929 paise.

{\color{Blue} \therefore }  Number of members = {\color{Blue} \sqrt{5929}} = 77.

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15 1712
Q:

If , the square root of 67,60,000 is:

A) 2.6 B) 26
C) 260 D) 2600
 
Answer & Explanation Answer: D) 2600

Explanation:

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20 1549
Q:

A) 3sqrt{3} B) 8sqrt{3}
C) 14 D) 14+8sqrt{3}
 
Answer & Explanation Answer: C) 14

Explanation:

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29 1090
Q:

A) 3 B) 3sqrt{2}
C) 6 D) None of these
 
Answer & Explanation Answer: D) None of these

Explanation:

 

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13 1042