Question

If '$\to$' means '$\times$', '$\uparrow$', means '$-$', '$\leftarrow$' means '+', '$\downarrow$' means '+', '$\nearrow$' means ${}^{\prime }{=}^{\prime }$ and '$\nwarrow$' means '$>$ then which one of the answer is not correct?

• A. $10\to 5\uparrow 2\leftarrow 8\downarrow 4\nearrow 6\to 8$
• B. $10\to 3\downarrow 3\uparrow 5\leftarrow 9\nwarrow 6\to 2$
• C. $10\leftarrow 7\to 6\downarrow 3\uparrow 8\nwarrow 4$
• D. $10\to 6\downarrow 2\leftarrow 7\uparrow 5\nwarrow 10\to 4\uparrow 9$

Answer 1

Answer: (A)

$10\to 5\uparrow 2\leftarrow 8\downarrow 4\nearrow 6\to 8$

$10\to 5\uparrow 2\leftarrow 8\downarrow 4\nearrow 6\to 8$ implies

$10\times 5-2+8+4=6\times 8$. It means $60=48$, which is not true.

$10\to 3\downarrow 3\uparrow 5\leftarrow 9\nwarrow 6\to 2$ implies

$10\times 3+3-5+9>6\times 2$. It means $37>12$, which is true.

$10\leftarrow 7\to 6\downarrow 3\uparrow 8\nwarrow 4$ implies

$10+7\times 6+3-8>4$. It means $47>4$, which is true.

$10\to 6\downarrow 2\leftarrow 7\uparrow 5\nwarrow 10\to 4\uparrow 9$ implies

$10\times 6+2+7-5>10\times 4-9$. It means $64>31$, which is true.

Thus, only 1st statement is incorrect.