SASMO 2021 Grade 8 Question 3
SASMO · SASMO 2021 Grade 8
If $a$ is a positive integer and $b=(a+1)^a+a^{a+1}$, which statement is always true?
$b$ is a multiple of 3 when $a$ is even.
$b$ is even for all $a$.
$b$ is odd for all $a$.
$b$ is prime for all $a$.
None of the above