A man bought a shirt at a sale. He saves $30 on the normal price when he paid $120 for the shirt. What was the percentage discount on the shirt?

Osmosis is:

Genetic engineering involves:

Which of the following devices are MOST LIKELY to be used at an airport for border control activities?

The diagram above shows the graphs of 3x - y = 1 and 5x + 2y = 20 . Which ordered pair (x, y) satisfies both equations?

Overfishing means:

Which one of the following is NOT a receptor in the body?

The decimal equivalent of ⁷/₈ is

The type of polymerisation used to make polythene is called:

The halogen used to make bleach is called:

Items bought by a trader for $80 are sold for $100. The profit expressed as a percentage of cost price is

In the reactivity series of metals the order is: sodium, calcium, magnesium, aluminium, which means that the most reactive metal is:

The pH scale runs from 1 to:

During adolescence, boys:

Alcohol can be separated from beer using:

Which of the following is NOT found dissolved in plasma?

The following are all minerals EXCEPT for:

Profits in the partnership of Bess, Bill and Bob are shared in the ratio 1 : 2 : 3. If Bill's share of the profits is $300, what is Bob's share?

3x - 4(x + 6) =