400
Odd man out.
1) thistle, cornflower, daffodil, rose, shamrock ;
2) bought, found, sold, comb, told;
3) sleepy, frightened, strange, loud, colour
1) cornflower (the others are the symbols of the parts of the UK);
2) comb (the others are in the past tense);
3) colour (the others are adjectives/omadussõnad)