I bought 4 potatoes that weighed 1 1/4 kg altogether. Three of them weighed 320g, 450g and 150g. What did the fourth one weigh?

AAAaannndd the bot gets it wrong yet again!

the three spuds weigh 920g
so the 4th must weigh 1250-920 = 330g

The fourth potato weighed 280g.