Read the given question and decide which of the following statements is/are sufficient to answer the
question
What is the value of z?
1. z2 + (-1) = 0
2. z = \( \sqrt{n} \), n is a natural number
Neither 1 nor 2 is sufficient
Only 2 is sufficient
Both 1 and 2 are sufficient
Only 1 is sufficient
Select the option that can replace the question mark (?) in the following series.
A can do a piece of work in 8 hours while B alone can do it in 12 hours. Both A and B working together can finish the work in how much time?
10 hours
4 hours
\( \frac{24}{5} \) hours
\( \frac{21}{4} \) hours
\(\frac{0.12 \div 0.15}{2}\) =?
What is the area (in m2) of a triangular field whose sides measure 25 m, 39 m and 56 m?