For the next question, click on the Next Question button.

SET 1: Question 1 of 6

You need to prepare 21 doses, each dose to contain 200 mg of drug A. How many grams of drug A do you need?

Type in your answer and PRESS ENTER.

g
You need 4.2 grams of drug A.

Total Amount = Size of Single Dose x Number of Doses

Total Amount of Drug = 200 x 21 mg
Total Amount of Drug = 4200mg

But the question asked for the number of GRAMS, so the total needed is 4200 / 1000 g ie 4.2g.

Total Amount = Size of Single Dose x Number of Doses

No, that is not the correct answer.

Have another go: just type in your new answer and press Return.

If you continue to have problems, click on the Answer button to see the answer.

For the next question, click on the Next Question button.

SET 1: Question 2 of 6

What is the size of a single dose (in millilitres) if 300ml of a solution contains 20 doses?

Type in your answer and PRESS ENTER.

ml
A single dose is 15ml.

Size of Single Dose=     Total Amount    
Number of Doses

Size of Single Dose = 300
20
Size of Single Dose = 15ml

Total Amount = Size of Single Dose x Number of Doses

No, that is not the correct answer.

Have another go: just type in your new answer and press Return.

If you continue to have problems, click on the Answer button to see the answer.

For the next question, click on the Next Question button.

SET 1: Question 3 of 6

If a single dose of drug X weighs 400 mg and you have 12 g of the drug, how many doses can you give?

Type in your answer and PRESS ENTER.

doses
You can give 30 doses.

First convert the total amount to milligrams:
12 g = 12000 mg

Number of Single Doses=     Total Amount    
Size of Single Dose

Number of Doses = 12000
400
Number of Doses = 30

Number of Doses =     Total Amount    
Size of Single Dose

No, that is not the correct answer.

Have another go: just type in your new answer and press Return.

If you continue to have problems, click on the Answer button to see the answer.

For the next question, click on the Next Question button.

SET 1: Question 4 of 6

A patient is given a total of 10 g of a drug which contains 25 doses. How much drug (milligrams) does the patient take at each dose?

Type in your answer and PRESS ENTER.

mg
The patient takes 400 mg at each dose.

First you need to convert the total amount to milligrams:
10 g = 10000 mg.

Size of Single Dose =     Total Amount   
Number of Doses

Size of Single Dose = 10000
25
Size of Single Dose = 400 mg

Size of Single Dose=     Total Amount    
Number of Doses

No, that is not the correct answer.

Have another go: just type in your new answer and press Return.

If you continue to have problems, click on the Answer button to see the answer.

For the next question, click on the Next Question button.

SET 1: Question 5 of 6

You know that a patient has had 27 tablets, each containing 500 mg of drug X. How much drug X (grams) has the patient had?

Type in your answer and PRESS ENTER.

g
The patient has had a total of 13.5grams of drug X.

Total Amount = Size of Single Dose x Number of Doses

Total Amount = 500 x 27mg
Total Amount = 13500g
The answer needs to be in grams:
Total Amount = 13.5grams

Total Amount = Size of Single Dose x Number of Doses

No, that is not the correct answer.

Have another go: just type in your new answer and press Return.

If you continue to have problems, click on the Answer button to see the answer.

For the next question, click on the Next Question button.

SET 1: Question 6 of 6

How many tablets can you make from 6 g of a drug if each tablet is to contain 500 mg?

Type in your answer and PRESS ENTER

tablets
You can make 12 tablets.

You need to convert the total amount into milligrams:
6 g = 6000 mg

Number of Doses =    Total Amount   
Size of Single Dose

Number of Doses = 6000
500
Number of Doses = 12

Size of Single Dose=    Total Amount   
Number of Doses

No, that is not the correct answer.

Have another go: just type in your new answer and press Return.

If you continue to have problems, click on the Answer button to see the answer.