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Upon this I set myself to explain the meaning of all the combinations⁠—of “ rouge et noir ,” of “ pair et impair ,” of “ manque et passe ,” with, lastly, the different values in the system of numbers. The Grandmother listened attentively, took notes, put questions in various forms, and laid the whole thing to heart. Indeed, since an example of each system of stakes kept constantly occurring, a great deal of information could be assimilated with ease and celerity. The Grandmother was vastly pleased.

“But what is zero?” she inquired. “Just now I heard the flaxen-haired croupier call out ‘zero!’ And why does he keep raking in all the money that is on the table? To think that he should grab the whole pile for himself! What does zero mean?”

“Zero is what the bank takes for itself. If the wheel stops at that figure, everything lying on the table becomes the absolute property of the bank. Also, whenever the wheel has begun to turn, the bank ceases to pay out anything.”

“Then I should receive nothing if I were staking?”

“No; unless by any chance you had purposely staked on zero; in which case you would receive thirty-five times the value of your stake.”

“Why thirty-five times, when zero so often turns up? And if so, why do not more of these fools stake upon it?”

“Because the number of chances against its occurrence is thirty-six.”

“Rubbish! Potapitch, Potapitch! Come here, and I will give you some money.” The old lady took out of her pocket a tightly-clasped purse, and extracted from its depths a ten-gülden piece. “Go at once, and stake that upon zero.”