In the circle above, the circumference is 10 cm. The length of the arc AB, in centimetres, is

An enzyme which has an optimum pH of 3 will function best in the:

The group of elements whose molecules and atoms are the same is called:

The second most common gas in the atmosphere is:

Which of the following are real accounts?

1. Furniture Account
2. Debtors Account
3. Capital Account
4. Motor Car Account

All of these are trace elements EXCEPT for:

A man and woman plan to start a family. Which of the following is likely to be LEAST important to them?

Which one of the following pairs of definitions is correct?

Atherosclerosis is a process in which:

Which of the following may result if many people do what the young man in the picture is doing?

1. The rapid growth of cities
2. The growth of shanty towns and squatter settlements
3. The brain drain experienced by many developing countries
4. Inadequate housing, educational and health facilities in urban areas

The halogen, bromine, at room temperature is a:

In the rectangle above, if ∠AEB = 80°, then ∠DAC =

Three lights flash at intervals of 2, 6 and 14 seconds respectively. They are started together. How soon after will they next flash together again?

Which one of the following is a biological component of a pond ecosystem?

A loudspeaker emits a steady note.A girl sings a note which is of lower pitch but higher volume. The sound wave she is producing has:

Transition metals have all of these properties EXCEPT for:

Each of the features of our bodies is controlled by a:

A spring is 100 mm long when unstretched. A 40 N load is hung from it, and its total length increases to 120 mm. A different load on the spring causes it to become 150 mm long. If the spring obeys Hooke′s Law, this second load is:

Overfishing means:

A trader received an invoice for $4,000 less 25% trade discount. Subsequently he returned one eighth of the goods. What amount would be entered in his Returns Outwards Account?