**Question 81 – “Is x^2…”**

OG Explanation is fine.

**Question 82 – “Michael…”**

OG Explanation is fine.

**Question 83 – “If xy > 0….”**

OG Explanation is fine.

**Question 84 – “The only…”**

OG Explanation is fine.

**Question 85 – “Last year….”**

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**Question 86 – “If m and n are consecutive…”**

OG Explanation is okay. For statement I, a more intuitive approach might be better.

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**Question 87 – “If k and n……”**

OG Explanations for 1 and 2 are fine.

**Alternate way to combine Statements 1 and 2. **

Statement 1: n-3=2k n=2k + 3

Statements 1 and 2: n= (2k – 4) + 7

From statement 2, 2k-4 is divisible by 7. If 7 is added to a number that is already divisible by 7, the sum must be divisible by 7.

The correct answer is C.

**Question 88 – “Is the perimeter….”**

OG Explanation is fine.

**Question 89 – “If x+y+…”**

OG Explanation is fine but lengthy.

**Question 90 – “Can the positive…”**

OG Explanation is fine.