Question

If $77x\equiv 88$ (mod $5$), then $x$ is equal to

• A. 4
• B. 61
• C. 59
• D. 48

Answer 1

Answer: (A)

Give that, $77x\equiv 88$ (mod $5$)
$\Rightarrow 77x-88$ is divisible by $5$.
$\therefore x=4$
[$\because 77\times 4-88=308-88=220$ is divisible by $5$]