In fairness the question is open to interpretation. They don't specify if they mean western or eastern Arabic numerals.
As schools in the west already teach western, the people responding could justifiably deduce that the question is referring to eastern.
But the Eastern Arabic numbers are the same as the western ones except that the Arabs call them Indian numbers
"What kind of swallow, African or European?"
In fairness the question is open to interpretation. They don't specify if they mean western or eastern Arabic numerals.
As schools in the west already teach western, the people responding could justifiably deduce that the question is referring to eastern.
But the Eastern Arabic numbers are the same as the western ones except that the Arabs call them Indian numbers
"What kind of swallow, African or European?"