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?

The expression a² + b² is equivalent to

Which of the following is a prime number?

When we sweat, we lose heat because:

How many grams are in 2.5 kilograms?

The Earth′s first atmosphere contained all of these gases EXCEPT for:

Sweating can help to cool the body. This cooling is achieved mainly by:

A salt that contains water of crystallisation is:

All of the following processes result in energy loss from an ecosystem EXCEPT for:

Which of the following substances contains the elements carbon, hydrogen, oxygen and nitrogen?
Ⅰ DNA
Ⅱ carbohydrates
Ⅲ lipids
Ⅳ proteins

__________ enables users to convert the image from a fax modem to text and then edit it.

-7 - (-3) =

Potassium reacts quickly with water but we do not use it with acids because:

Which of the following may contribute to group cohesion in the Caribbean?

1. Clear goals
2. Special privileges
3. Similar interests
4. Shared values

Arrange the following secondary storage devices in order of increasing capacity from smallest to largest: a 1GB memory card, CD-ROM, DVD and a 128 MB flash drive.

If an increase of 20% will change the price of an item to $480, what is the original price of the item?

Two separate forces are acting on a bar to cause it to rotate clockwise. One force is 20 N, at a distance of 3 m out from the pivot; the second force, 2 m further out, is 10 N. Their combined moment is:

Candied fruits are preserved in a strong solution of:

Which one of the following comparisons of inhaled and exhaled air is correct?

A collection of several tissues which carry out a particular function is called: