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Answer
Figure This!
 

Quick Answer:

The most numerous gifts are boxes of candy and bracelets (30 each).

Complete Solution:

Use the pattern described in the challenge to complete the table of gifts received on each day. Then calculate the total number of each type of gift. As shown below, Exponent receives a total of 30 boxes of candy and 30 bracelets.

  
 
Day
1
2
3
4
5
6
7
8
9
10
Total
Kitten
 1 1 1 1 1 1 1 1 1 1 10
H-Bird
   2 2 2 2 2 2 2 2 2 18
Ring
     3 3 3 3 3 3 3 3 24
Book
       4 4 4 4 4 4 4 28
Candy
         5 5 5 5 5 5 30
Bracelet
           6 6 6 6 6 30
Bouquet
             7 7 7 7 28
Perfume
               8 8 8 24
CD
                 9 9 18
Puppy
                   10 10
 
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