**Question 1:**
Which of the following are geometric series?

**Question 2:**
Which of the following are geometric series?

**Question 3:**
Find a common ratio in the following geometric series: $5,15,\mathrm{45...}$

**Question 4:**
Find the $14$th term in the following geometric series: $12,6,\mathrm{3...}$

**Question 5:**
Find the sum of the first $5$ terms in the following series: $3\frac{1}{2},7,14,\mathrm{...}$

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