Hello?

Riddle: What number(s) do you use to greet someone?

Answer: 07734 Get it? Write it in robotic form and turn it around. What do you get?: hELLO

Source: https://www.riddles.com/index.php/10819

What number(s) do you use to greet someone? — Hello? by Jack Tay Yu Jie v1.

Riddle: What number(s) do you use to greet someone? Answer: 07734 Get it? Write it in robotic form and turn it around. What do you get?: hELLO — by Jack Tay Yu Jie v2.