Final answer:
Raj needs to buy 6 packs of stickers to reach his goal of at least 100 stickers in his collection.
Step-by-step explanation:
To determine how many packs Raj needs to buy, we first need to find out how many stickers he already has and then calculate the difference between that number and his goal of 100 stickers. Raj currently has 35 stickers, so he needs 100 - 35 = 65 more stickers to reach his goal.
Since stickers come in packs of 12, we divide the number of additional stickers needed by 12 to find out how many packs Raj must buy. In this case, 65 ÷ 12 = 5.42. However, since Raj cannot buy a fraction of a pack, we round up to the nearest whole number and conclude that he needs to buy 6 packs to reach his goal.