I start at the year 2024 and count backwards, 7 years at a time, giving the sequence of years: 2024, 2017, 2010,... Which is the only year that is NOT in the sequence?

16 (A)

Ones column: $8 + 6 = 14$. Write 4, carry over 1.

Tens column: $2 + 3 + 1 = 6$.

\begin{array}{r@{}r@{}l} & 2 & 8 \\ + & 3 & 6 \\ \hline & 6 & 4 \\ \end{array}

Jumlah: 64

17 (B)

Ones column: $7 + 9 = 16$. Write 6, carry over 1.

Tens column: $4 + 4 + 1 = 9$.

\begin{array}{r@{}r@{}l} & 4 & 7 \\ + & 4 & 9 \\ \hline & 9 & 6 \\ \end{array}

Jumlah: 96

18 (C)

Ones column: $5 + 9 = 14$. Write 4, carry over 1.

Tens column: $3 + 2 + 1 = 6$.

\begin{array}{r@{}