Sheet # 111 Critical Thinking
Name: _____________________ Date_____________
Use drawings, words, or numbers to explain how you got your answer.
Starting at age 4, Jane receives as many books on her birthday as many years old she is that day. How old is Jane when the total number of books she ever received is 100?
Answers for sheet # 111
When Jane is 15 years old.
Age
Books received
Total Books Received
4
4
4
5
5
4 + 5 = 9
6
6
15
7
7
22
8
8
30
9
9
39
10
10
49
11
11
60
12
12
72
13
13
85
14
14
99
15
15
114