An arc of a circle subtends an angle of \(30^\circ\) on the circumference of a circle of radius 21cm. Find the length of the arc.

Simplify 1 - (7/3 x 5/4) + 2/5

Simplify 2134 x 234

In a class of 40 students, 32 offer mathematics, 24 offer Physics, and 4 offer neither Mathematics nor Physics. How many offer both Mat ematics and Physics?

A cinema halll contains a certain number of people. If 25/2% are children, 95/2% are men and 84 are women, find the number of men in the hall.

Evaluate \( \log_{\sqrt{2}} 4 + \log_{\frac{1}{2}} 16 - \log_{4} 32 \)

A woman buys 270 oranges for ₦1800.00 and seels at 5 for ₦40.00. What is her profit?

Find \(\left(\frac{1}{0.06} \div \frac{1}{0.042}\right)^{-1}\)

Simplify (√98 -√50)/√32