A trader bought goats for N4000 each. He sold them for N180,000 at a loss of 25%. How many goats did he buy?
Evaluate: \(\frac{0.21 \times 0.072 \times 0.00054}{0.006 \times 1.68 \times 0.063}\)
Simplify \((\sqrt{0.7} + \sqrt{70})^{2}\)
In a school, 220 students offer Biology or Mathematics or both. 125 offer Biology and 110 mathematics. How many offer Biology but not Mathematics?
Without using tables, evaluate \((343)^{\frac{1}{3}} \times (0.14)^{-1} \times (25)^{-\frac{1}{2}}\)