Answer:
You can buy 66 cookies in 3 ways.
Step-by-step explanation:
Step 1
Buying only six packages of 11
6*11 = 66
therefore
1st way -----> 6 packages of 11
Step 2
Buying only two packages of 33
2*33 = 66
2nd way -----> 2 packages of 33
Step 3
Buying 1 package of 33 and 3 packages of 11
1*33 + 3*11 = 66.
520 because 65 x 8 is 520
90