The dandelion blooms in the morning, flowers yellow for two days, turns white on the third morning, and by evening it has scattered. Yesterday afternoon, there were 20 yellow and 14 white dandelions on the meadow, and today there are 15 yellow and 11 white.

a) How many yellow dandelions were there on the meadow the day before yesterday?

b) How many white dandelions will there be on the meadow tomorrow?
a) All dandelions that were yellow the day before yesterday have turned white yesterday or today. Therefore, there were 14 + $11=25$.

b) Out of the yellow dandelions from yesterday, 11 turned white today, and the rest $20-11$ = 9 will turn white tomorrow.

## Answer

a) 25 ;
b) 9.