Logical Reasoning · Logical Reasoning
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A medication dose starts at 100mg and halves each day. What will be the dose on day 4?
- A
12.5 mg
- B
25 mg
- C
30 mg
- D
50 mg
The correct answer is 12.5 mg. The dosage halves each day, so on Day 1, the dose is 100 mg. On Day 2, it becomes 50 mg (100 mg ÷ 2), on Day 3 it is 25 mg (50 mg ÷ 2), and finally, on Day 4, it is 12.5 mg (25 mg ÷ 2). The other options are incorrect because they correspond to doses on different days: 25 mg is Day 3, 50 mg is Day 2, and 30 mg does not fit into the halving sequence.
This is the correct answer. Starting from 100 mg, the dose halves each day: Day 1 = 100 mg, Day 2 = 50 mg, Day 3 = 25 mg, and Day 4 = 12.5 mg.
This option is incorrect. It represents the dose on Day 3, not Day 4.
This option is incorrect. The dose does not follow the halving pattern and does not correspond to any day in the sequence.
This option is incorrect. It represents the dose on Day 2, not Day 4.
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