This question refers to the triangle PQR in which angle QPR = 90°, PR = 12 cm and PQ = 5 cm.

The length of QR, in cm, is

THE ITEM refer to the following family functions.

The family produces children and maintains the population.

Which of the following sets has a finite number of members?

After a 5% discount, an article is sold for $475. The price before the discount was

All of the following devices are commonly used non-impact printers EXCEPT __________.

A circular hole with diameter 6 cm is cut out of a circular piece of card with a diameter of 12 cm. The area of the remaining card, in cm² , is

The charge on a sodium ion is always:

THE ITEM refer to the following dialogue.

Sita: When Marvin was group leader he was always ordering us about.

Paul: Me, I prefer a group leader who allows members to do as they please.

The leadership style of Marvin as described in the dialogue above is.

The number 0.0417 in standard form is

0.045 × 10^-3 in scientific notation is

The optimum pH for most enzyme action is:

The aim of the experiment shown above was to find out if:

The following diagram shows a model used to show how breathing movements take place:

Which part of the model represents the diaphragm?

To electrolyse solid lead bromide it must first be heated so that:

THE ITEM refers to the following illustration.

The pattern where many persons make the same decision as the young man in the picture is refered to as

In making bread the enzymes in yeast break down starch to give:

We lose water mainly in:

A shopkeeper buys 48 radios for a wholesale price of $7200. At what price per radio must he sell to make a profit of 15% on his cost?

Which of the following are examples of environmental variation in humans?
Ⅰ hair colour
Ⅱ height
Ⅲ intelligence
Ⅳ body mass

The area of the trapezium ABCD above is