Question

if there is a new moon today, in how many days will the next full moon occur?
29 or 30
14 or 15
7 or 8
3 or 4
22 or 23

Explanation:

Step1: Recall lunar cycle knowledge

The lunar cycle from new - moon to full - moon is approximately half of the total lunar cycle. The total lunar cycle (from new - moon to new - moon) is about 29.5 days.

Step2: Calculate days from new - moon to full - moon

Half of 29.5 days is around 14.75 days. So, it is 14 or 15 days from a new - moon to the next full - moon.

Answer:

14 or 15