1. "A 6-figure number, eh?" said Achraf, glancing at the boy's working. "What's so special about it?" "Look, Dad," Mo replied. "If you shift the second half and put it in front of the first half, you get two more than three times the original number." As simple as that! But what was the number?

The number was 249749

The number was 147253

The number was 359986