Question

$★$ is twice the difference between the $6^{th}$ and the ${10}^{th}$ multiple of $7$. Find $★$.

• A. $56$
• B. $28$
• C. $70$
• D. $42$

Answer 1

The correct option is A $56$

$★$ is twice the difference of $6^{th}$ and ${10}^{th}$ multiple of $7.$

$\therefore$ $6^{th}$ multiple of $7=42$

${10}^{th}$ multiple of $7=70$

(${10}^{th}$ multiple of $7$)($6^{th}$ multiple of $7$)

$=70-42$

$=28$

$★=2\times 28=56$