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# If Q is a factor of 18 and T is prime numbers between 2 and 18…

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**If Q is a factor of 18 and T is prime numbers between 2 and 18. What is Q ****Ո**** T?**

**A. (2, 3)****B. (2, 3, 6)****C. (2, 3, 9)****D. (2, 3, 18)**

**QUICK ANSWER…**

**A**

**SOLUTION****… **** **

**Factors of 18 are positive whole numbers that can divide 18 without a remainder.**

**Prime numbers are numbers that can be divided by only 1 and itself.**

**Given:**

**Q = factor of 18 = (2, 3, 6, and 9)**

**T = prime numbers between 2 and 18 = (2, 3, 5, 7, 11, 13, and 17)**

**Therefore, Q ****Ո**** T = elements found in both = (2, 3)**

**Now for the right answer to the above question:**

**Option A is correct.****Option B is incorrect. 6 is not a prime number, it can be completely divided by 2 and 3.****C is incorrect. 9 is not a prime number, it can be divided by 3.****D is not the correct answer. 18 is not a prime number, it can be wholly be divided by 2, 3, 6, and 9.**

**KEY-POINTS…**

**You may please note the****se/this****:**

**Prime numbers are numbers that will always have a remainder when divided by any number except 1 and the number itself.****The symbol ‘Ո’ signifies intersection, this is basically elements found in two intersecting sets.**

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**/**** ****culled from ****201****6 ****JAMB-UTME ****mathematics past ****question**** 41 ****/**