Terry still have 384 peices of chocolate bars
Solution:
Given that Terry buys 34 boxes of chocolate bars and gave 18 of her boxes away to her older brother
To find: Number of pieces Terry still have
Total boxes with Terry initially = 34 boxes
Now terry has given 18 of her boxes to her older brother
So the boxes now left with Terry is:
boxes left with Terry = Total boxes with Terry initially - number of boxes given to older brother
boxes left with Terry = 34 - 18 = 16
So Terry has 16 boxes left
Each box has 24 chocolate bars inside it
1 box = 24 chocolate bars
So, 16 boxes = 24 x 16 = 384
So Terry has 384 peices of chocolate bars left