export declare function setApiKey(apiKey: string): void;
export declare function isEven(n: number): Promise<boolean | undefined>;
export declare function isOdd(n: number): Promise<boolean | undefined>;
export declare function areEqual(a: number, b: number): Promise<boolean | undefined>;
export declare function areNotEqual(a: number, b: number): Promise<boolean | undefined>;
export declare function isGreaterThan(a: number, b: number): Promise<boolean | undefined>;
export declare function isLessThan(a: number, b: number): Promise<boolean | undefined>;