**Question 161 – “Beginning in January of last year…”
** OG Explanation is fine.

**Question 162 – “If n and k are positive integers…”
** OG Explanation is fine.

**Question 163 – “In a certain business, production index p is directly…”
** OG Explanation is fine.

**Question 164 – “In the rectangular coordinate system, are the points…”
** OG Explanation is fine.

Khan Academy (OG 11th) – Question 140 – Begins at 6:05

**Question 165 – “If x is an integer is…”
** OG Explanation is fine.

Khan Academy (OG 11th) – Question 142 – Begins at 4:30

**Question 166 – “If n is a positive integer…”
** OG Explanation is fine.

Khan Academy (OG 11th) – Question 144 – Begins at 6:35

**Question 167 – “If n is a positive integer…..tens digit of n”
** OG Explanation is fine.

**Question 168 – “What is the value of…”
** OG Explanation is fine.

** Question 169 – “Is n an integer…”
** OG Explanation is fine.

Khan Academy (OG 11th) – Question 146 – Begins at 2:35

**Question 170 – “If n is a positive integer…”
** OG Explanation is fine.

Khan Academy (OG 11th) – Question 147

**Question 171 – “What is the tens digit of positive integer x…”
** OG Explanation is fine.

Khan Academy (OG 11th) – Question 148 – Begins at 0:00

**Question 172 – “If x, y, and z are positive is x minus y….”
** OG Explanation is fine.

Khan Academy (OG 11th) – Question 149 – Begins at 2:10

**Question 173 – “If arc PQR above is a semicircle…”**

Question 174 – “Marcia’s bucket can hold a maximum…”

OG Explanation is okay. For statement 2, 3 liters represents an increase of (1/3) of a half full bucket. Thus, the 3 liters represents one-third of one-half the bucket’s capacity. In algebra this is 3 = (1/3)(1/2)(capacity), solving 3 = (1/6)(capacity), capacity = 18. SUFFICIENT The answer is B.

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