1. "Look, Mum," said Vicky, pointing to a sheet of paper on the table. "Can you multiply that number by 29 in your head?" Bianca looked. "Of course not. Can you?" "Sure I can," the girl replied. "Just write a one in front and a one behind, and it's the smallest number that works that way for 29 times." What was her number?

The number was 63324891

The number was 52631579

The number was 21889463