If x% of 240 equal 12, find x

If 85% of x is N3230, what is the value of x

Express 2.7864 × 10^–3 to two significant figures

Express 1975 correct to 2 significant figures

A casting is made up of Copper and Zinc. If 65% of the casting is Zinc and there are 147g of Copper. What is the mass of the casting?

Correct 0.002473 to 3 significant figures

Simplify 0.000215 × 0.000028 and express your answer in standard form

A shopkeeper allows a discount of 15% on the market price of a mobile phone. If a customer paid GH¢ 170.00 for a mobile phone. What was the marked price of the phone?

The length of a piece of stick is 1.75m. A girl measured it as 1.80m. Find the percentage error.

Express 302.10495 correct to five significant figures