Question 10

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Jambmaths question: 

$\begin{align}  & \text{If }P=\{x:x\text{ is odd, }-1<x\le 20\}\text{ and }Q=\{y:y\text{ is prime, }-2<y\le 25\},\text{ find }P\cap Q \\ & \text{(A)  }\!\!\{\!\!\text{ 3,5,7,11,17,19 }\!\!\}\!\!\text{ } \\ & \text{(B)  }\!\!\{\!\!\text{ 3,5,11,13,17,19 }\!\!\}\!\!\text{ } \\ & \text{(C)  }\!\!\{\!\!\text{ 3,5,7,11,13,17,19 }\!\!\}\!\!\text{ } \\ & \text{(D)  }\!\!\{\!\!\text{ 2,3,5,7,11,13,17,19 }\!\!\}\!\!\text{ } \\\end{align}$

Jamb Maths Solution: 

$\begin{align}  & P=\{x:x\text{ is odd, }-1<x\le 20\} \\ & P=\{1,3,5,7,9,11,13,15,17,19\} \\ & Q=\{y:y\text{ is prime, }-2<y\le 25\} \\ & Q=\{2,3,5,7,11,13,17,19\} \\ & P\cap Q=\{3,5,7,13,17,19\}\text{   (option B)} \\\end{align}$

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