Starting with a full container, milk is poured three times. first, 1/2 of the milk is poured out, then 1/3 of what remains, and, finally, 1/4 of the remaining milk. after the third pouring, what fraction of the full container of milk remains

1/4 of the full container remains

Step-by-step explanation:

Step 1: Half the milk is poured out

i.e 1/2 of the milk remains

Step 2: 1/3 of what remains is poured out --> 2/3 of the remaining is not poured out.

Hence amount remaining after step 2 = 2/3 x 1/2 = 1/3 of the total

Step 3: 1/4 of what remains is poured out --> 3/4 of the remaining is not poured out.

Hence amount remaining after step 3 = 3/4 x 1/3 = 1/4 of the full container remains

 30, 60, 90

Step-by-step explanation:

Factors of 30: (1,2,3,5,6,10,15,30)

Factors of 60: (1,2,3,4,5,6,10,12,15,20,30,60)

Factors of 90: (1,2,3,5,6,9,10,15,18,30,45,90)