A number r when divided by 8 leaves remainder 3. What will be the remainder when (r2 + 6r + 7) is divided by 8?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 2.
A number r when divided by 8 leaves the remainder of 3
When 8/3 remainder is 3
So, r = 3
Now, the value of (r2 + 6r + 7)
⇒ 32 + 6 × 3 + 7
⇒ 9 + 18 + 7 = 34
Now, when 34 is divided by 8 then, the remainder will be 2