Prereg Q&As: calculation question  May 5
Try this tough multiple completion calculation question to boost your preparation ahead of the preregistration exam.
1
Multiple Completion
Directions: For the question below, ONE or MORE of the responses is (are) correct. Decide which of the responses is (are) correct. Then choose:
A if 1,2 and3 are correct
B if 1 and 2 only are correct
C if2 and 3 only are correct
D if 1 only is correct
E if 3 only is correct
Directions Summarised


A
1,2,3

B
1,2

C
2,3

D
1 only

E
3 only

You are working in a hospital pharmacy department. You receive the following prescription for a child: Thyroxine suspension 37.5 micrograms/ 5ml Dose: 5ml daily 20 days supply The formula sheet that you will work to reads as follows: Thyroxine 50 microgram tablets sufficient quantity Compound Tragacanth Powder 10g Syrup 10ml Double Strength Chloroform Water 25ml Purified Water to 50ml You have in stock Concentrated Chloroform Water, but not Double Strength Chloroform Water. Which of the following statements is/are correct? A. The number of thyroxine 50 microgram tablets required is 15 B. The volume of Concentrated Chloroform Water required is 0.625ml C. The total volume of the suspension to be supplied is 2.5ml
Answer
1. D
Rationale/calculation Total volume of suspension to be supplied = 20 x 5ml = 100ml, so C is incorrect Total number of tablets required = 37.5 x 20 = 15, so A is correct 50 Volume of Concentrated Chloroform Water: Ratio of concentration of Concentrated Chloroform Water to Double Strength Chloroform Water = 1 in 20, therefore require: 25 = 1.25ml, so B is incorrect 20