 
<translate> Reggie yana wasan kwallo da abokinsa. Abokinsa ya zo da kwalba ɗari. Kowace wasa, suna yin fare goma marbles kuma duk wanda ya ci nasara ya samu ya ci gaba da dukan marbles. Bayan wasanni 9, Reggie yana da kwallo 90. Wasanni nawa ya yi rashin nasara? Ka yi tunani sosai da farko, sannan ka yanke shawara: <eng> Reggie is playing marbles with his friend. His friend arrives with 100 marbles. Each game, they bet ten marbles and whoever wins gets to keep all the marbles. After 9 games, Reggie has 90 marbles. How many games has he lost? Think carefully first, then make a decision: 