Think of 1 coulomb of charge like a large bulk order of items (like a gross of eggs), where instead of individual electrons, you are counting collections of fundamental charge units.

Remember '1 Coulomb has 6 point 25 into 10 to the 18 electrons' or simply associate $1\text{ C} \approx 6 \times 10^{18}\text{ electrons}$.

The charge $Q$ is quantized and given by the relation $Q = n \times e$, where $n$ is the number of electrons and $e$ is the elementary charge of a single electron ($1.602 \times 10^{-19}\text{ C}$). Rearranging this formula gives $n = \frac{Q}{e}$. Substituting $Q = 1\text{ C}$ and $e = 1.6 \times 10^{-19}\text{ C}$ yields $n = \frac{1}{1.6 \times 10^{-19}} \approx 6.25 \times 10^{18}$ electrons, which is commonly approximated in multiple-choice questions as $6 \times 10^{18}$ electrons.

Remember that current is rate of flow of charge ($I = \frac{Q}{t}$), and 1 Ampere flowing for 1 second transfers exactly $6.25 \times 10^{18}$ electrons past a cross-section of a conductor.