Elementary Brain Teaser

There are three children in a family. The oldest is 15. The average of their ages is 11. The median age is 10. How old is the youngest child?

Correct Solutions:

1. Brett Scharf. Nova Blanche Forman ES, Plantation, FL
2. Kelly Gough. Walkersville ES, Walkersville, MD
3. Amy Gough. Walkersville ES, Walkersville, MD
4. Elizabeth Gough. Walkersville ES, Walkersville, MD
5. Stephanie Parker. Sacred Heart School, Boise, ID
6. Amy Wojtkielewicz. Ridgefield ES, Erie, PA
7. Steven Carmain. Northwestern ES, Kokomo, IN
8. Kevin Schreck. Cross Lanes ES, Cross Lanes, WV
9. Tao Tao Chen. Ellis ES, Sunnyvale, CA
10. Nicole Antonoplos. St. Paul's ES, Nampa, ID
11. Thien Thai. Rostrevor College, Adelaide, South Australia
12. Chu Horace. Mann ES, Redmond, WA
13. Yahya Mohammed. Bluewater ES, Niceville, FL
14. Aaron DeSelms. Easthill ES, Kent, WA
15. Kevin Schein. Rainbow ES, Winter Springs, FL
16. Brett Hodges. Rainbow ES, Winter Springs, FL
17. Elise Hernandez. Rainbow ES, Winter Springs, FL
18. Rollie Johnson. Memorial MS, Orlando, FL
19. Kendra Alexander. Memorial MS, Orlando, FL
20. Renette Gerver. Memorial MS, Orlando, FL
21. Chaille Dennis. Memorial MS, Orlando, FL
22. George Waters. Rainbow ES, Winter Springs, FL
23. Vince Raley. Rainbow ES, Winter Springs, FL
24. Eric Konczal. Rainbow ES, Winter Springs, FL
25. Jennifer Stewart. Rainbow ES, Winter Springs, FL
26. Desiderio Britton. Rainbow ES, Winter Springs, FL
27. David Dellatto. Rainbow ES, Winter Springs, FL
28. Thomas Welch. Rainbow ES, Winter Springs, FL
29. Michael Scribner. Rainbow ES, Winter Springs, FL
30. Kevin Nethers. Rainbow ES, Winter Springs, FL
31. Alex King. Rainbow ES, Winter Springs, FL
32. Elise Sanderson. Memorial MS, Orlando, FL
33. Gary Smith. Memorial MS, Orlando, FL
34. Moses Deneus. Memorial MS, Orlando, FL
35. Lee Monestine. Memorial MS, Orlando, FL
36. Laura Cepero. Rainbow ES, Winter Springs, FL
37. Brooke Bushika. Rainbow ES, Winter Springs, FL
38. Jaskaran Singh. Rainbow ES, Winter Springs, FL
39. Payden Seibert. Rainbow ES, Winter Springs, FL
40. Michael Fiorenza. Rainbow ES, Winter Springs, FL
41. Jonathan Lau. Mississauga ES, Mississauga, Ontario, Canada
42. Dean Erlandson. Rainbow ES, Winter Springs, FL
43. Max Adelman. Zervas ES, Newton, MA
44. Amy Gilbert. Walkersville ES, Walkersville, MD
45. Daniel Geary. Lake Highland Prep, Orlando, FL
46. Adam Maberry. Buchanan ES, Pierre, SD
47. Carl Cassler III. Chisholm Trail ES, Keller, SD
48. Leonard Anghelescu. Broadlands PS, North York, Ontario, Canada.
49. Carl Cassler. Chisholm Trail ES, Ft. Worth, TX
50. Michael Beers. Laura E.Richards ES, Gardiner, ME
51. Michael Burdin. Laura E.Richards ES, Gardiner, ME
52. Stephanie Baird. Englewood Hills ES, Englewood, OH
53. Morgen York. Englewood Hills ES, Englewood, OH
54. Megan Humbert. Englewood Hills ES, Englewood, OH
55. Austin Suggs. Englewood Hills ES, Englewood, OH
56. Joshua Richardson. Englewood Hills ES, Englewood, OH
57. Corey Henningsen. Englewood Hills ES, Englewood, OH
58. Trace Aber. Englewood Hills ES, Englewood, OH
59. Chase Thomas. Englewood Hills ES, Englewood, OH
60. C.J. Bruce. Englewood Hills ES, Englewood, OH
61. Kyle Sierschula. Englewood Hills ES, Englewood, OH
62. Jemina Carnegia. Englewood Hills ES, Englewood, OH
63. Hannah Gordon. Tracy ES, Easton, PA
64. Johnathon Chapman. New Plymouth ES, New Plymouth ID
65. Jack McKie. New Plymouth ES, New Plymouth ID
66. Ben Schuster. New Plymouth ES, New Plymouth ID
67. Danielle Viculis. Rainbow ES, Winter Springs, FL
68. Nick Calvoni. Rainbow ES, Winter Springs, FL
69. Vanessa Pattillo. Rainbow ES, Winter Springs, FL
70. Allen Guillaume. Memorial MS, Orlando, FL
71. Anthony Spurill. Memorial MS, Orlando, FL
72. Stanley Aime. Memorial MS, Orlando, FL
73. Tiffany Hicks. Rainbow ES, Winter Springs, FL
74. Talha Anwar. Colton ES, Spring Valley, NY
75. Abraham Thomas. Colton ES, Spring Valley, NY
76. Osman Bhatty. Colton ES, Spring Valley, NY
77. Jane M. Baby. Colton ES, Spring Valley, NY
78. Matthew Watson. Colton ES, Spring Valley, NY
79. Benjamin Delvalle. Colton ES, Spring Valley, NY
80. John Abraham. Colton ES, Spring Valley, NY
81. Ashley Albinson. Rainbow ES, Winter Springs, FL
82. Nithin Thomas. Colton ES, Spring Valley, NY
83. Matthew Ortega. Colton ES, Spring Valley, NY
84. Eugene Berger. Colton ES, Spring Valley, NY
85. Adam Basile. Colton ES, Spring Valley, NY
86. Lynn Leandre. Colton ES, Spring Valley, NY
87. Francesca Ball. Colton ES, Spring Valley, NY
88. Adam Thornton. Walnut Creek MS Erie, PA
89. Adam Browning. Colton ES, Spring Valley, NY
90. Jaclyn Mackawgy. Colton ES, Spring Valley, NY
91. Devin Cozart. Colton ES, Spring Valley, NY
92. Andrew Marquez. Colton ES, Spring Valley, NY
93. Michelle Ly. Colton ES, Spring Valley, NY
94. Leandra Cheng. Colton ES, Spring Valley, NY
95. Chelsea Jackson. Colton ES, Spring Valley, NY
96. Daniel Guanzon. Colton ES, Spring Valley, NY
97. Zenobia Azeem. Norcross ES, Norcross, GA
98. Allison Freeman. Norcross ES, Norcross, GA
99. Ashley Albinson. Rainbow ES, Winter Springs, FL
100. Megan Haddock. Rainbow ES, Winter Springs, FL
101. Megan Robinson. Rainbow ES, Winter Springs, FL
102. Illania Nelson. Rainbow ES, Winter Springs, FL
103. Damaris Britton. Rainbow ES, Winter Springs, FL
104. Arlenys Nunez. Rainbow ES, Winter Springs, FL
105. Kim Fitzgerald. Rainbow ES, Winter Springs, FL
106. Aubrey Wingo. Rainbow ES, Winter Springs, FL
107. Lauren Aouate. Rainbow ES, Winter Springs, FL
108. Meagen Hall. Rainbow ES, Winter Springs, FL
109. Pat Haines. New Plymouth MS, New Plymouth, ID
110. Briana Bennett. Rainbow ES, Winter Springs, FL
111. Aaron Bisbee. Walnut Creek MS, Erie, PA
112. Bryan Tyler. Walnut Creek MS, Erie, PA
113. Chris McDonald. Walnut Creek MS, Erie, PA
114. James Britton. Walnut Creek MS, Erie, PA
115. Danielle Viculis. Rainbow ES, Winter Springs, FL
116. Vanessa Cichon. Rainbow ES, Winter Springs, FL
117. Mike Van Diggelen. Rainbow ES, Winter Springs, FL
118. Amanda Townsend. Rainbow ES, Winter Springs, FL
119. Kyle DuBose. Rainbow ES, Winter Springs, FL
120. Kurtis McLeod. New Plymouth MS, New Plymouth, ID
121. Scott Salant. Colton School, Spring Valley, NY
122. Lia Mahabir. Colton School, Spring Valley, NY
123. Nadege Dorcelly. Colton School, Spring Valley, NY
124. Chrissy Luu. Colton School, Spring Valley, NY
125. Kiersten Baker. Barnett Shoals School. Athens, GA
126. Caroline Bowman. Barnett Shoals School. Athens, GA
127. Sunny Jeong. Barnett Shoals School. Athens, GA
128. Sarah Hafner. Barnett Shoals School. Athens, GA
129. Alexandria Waldrop. Barnett Shoals School. Athens, GA
130. Christina Faust. Barnett Shoals School. Athens, GA
131. Naomi Zeichner. Barnett Shoals School. Athens, GA
132. Tyler Sanders. Sonny Carter ES, Macon, GA
133. Jeff Vernon Fenchel, Franklin ES, Madison, WI
134. J J McFadden. Rainbow ES, Winter Springs, FL
135. Nick Midura-Ellis. Lincoln Akerman ES, Hampton Falls, NH
136. Steve Sicard. Lincoln Akerman ES, Hampton Falls, NH
137. Rossli Chace. Lincoln Akerman ES, Hampton Falls, NH
138. Alexander Lu. Walnut Creek MS, Erie, PA
139. Sam Laver. Walnut Creek MS, Erie, PA
140. Valerie Adams. Walnut Creek MS, Erie, PA
141. Stephanie Jakiel. Walnut Creek MS, Erie, PA
142. Melissa Lupo. Walnut Creek MS, Erie, PA
143. Marybeth Anderson. Walnut Creek MS, Erie, PA
144. Jenni Hilbert. Walnut Creek MS, Erie, PA
145. Emily Dopierala. Walnut Creek MS, Erie, PA
146. Kyle Shaffer. Walnut Creek MS, Erie, PA
147. Sean Fordorko. Walnut Creek MS, Erie, PA
148. Erica DeWolf. Walnut Creek MS, Erie, PA
149. Megan Marquis. Walnut Creek MS, Erie, PA
150. Allison Peirce. Walnut Creek MS, Erie, PA
151. Zach Haras. Walnut Creek MS, Erie, PA
152. Rachael Calender. Highland ES, Apple Valley, MN
153. Amanda Clifford. St. Mary's School, Painesville, OH
154. Alex Jitariu. Kingslake PS, North York, ON, Canada
155. Cody Lewis. Southeast MS, Ravenna, OH
156. Angela Palmer. Central ES, Nevada, IO
157. Brian Pierre. Carmen Arace MS. Bloomfield, CT
158. Delorean Bynoe. Carmen Arace MS. Bloomfield, CT
159. Kevin Melanson. Carmen Arace MS. Bloomfield, CT
160. Justin Ortique. Carmen Arace MS. Bloomfield, CT
161. Taylor Stewart. Carmen Arace MS. Bloomfield, CT
162. Alfredo Fuentes. Carmen Arace MS. Bloomfield, CT
163. Joseph Broaden. Carmen Arace MS. Bloomfield, CT
164. Lance McDougald. Carmen Arace MS. Bloomfield, CT
165. Monique Rochon. Carmen Arace MS. Bloomfield, CT
166. Monica Rochon. Carmen Arace MS. Bloomfield, CT
167. Teresa Morrison. Carmen Arace MS. Bloomfield, CT
168. Mark Atkins. Carmen Arace MS. Bloomfield, CT
169. Nicole Touzel. South Conway ES, Conway, SC
170. Billy High. South Conway ES, Conway, SC
171. Eugene Bellamy. South Conway ES, Conway, SC
172. Jessica Weaver. South Conway ES, Conway, SC
173. Dusty Davis. South Conway ES, Conway, SC
174. Kenisha McCall. South Conway ES, Conway, SC
175. Adam Morrison. Walnut Creek MS, Erie, PA
176. Nick Caruso. Walnut Creek MS, Erie, PA
177. Ryan Halko. Walnut Creek MS, Erie, PA
178. Katie Renze. Walnut Creek MS, Erie, PA
179. Allison Stewart. Walnut Creek MS, Erie, PA
180. Asahley Spurgeon. Walnut Creek MS, Erie, PA
181. Stephanie Lagner. Walnut Creek MS, Erie, PA
182. Patrick MacDonald. Walnut Creek MS, Erie, PA
183. Erica Blake. Walnut Creek MS, Erie, PA
184. Amanda Haller. Walnut Creek MS, Erie, PA
185. Felecia Platz. Walnut Creek MS, Erie, PA
186. Dan Pietrasiewicz. Walnut Creek MS, Erie, PA
187. Ashley Holman. Walnut Creek MS, Erie, PA
188. Stephen Eller. Walnut Creek MS, Erie, PA
189. Allison Curtis. Walnut Creek MS, Erie, PA
190. Tracy Foessett. Walnut Creek MS, Erie, PA
191. Molly Ackerman. Walnut Creek MS, Erie, PA
192. Jonathan Strain. Walnut Creek MS, Erie, PA
193. Matt Detisch. Walnut Creek MS, Erie, PA
194. Deanna Dobrich. Walnut Creek MS, Erie, PA
195. Paul Schlabach. Walnut Creek MS, Erie, PA
196. Alyssa Monacella. Walnut Creek MS, Erie, PA
197. Brad Cottle. Walnut Creek MS, Erie, PA
198. Monica Wagner. Walnut Creek MS, Erie, PA
199. Adam Shore. Walnut Creek MS, Erie, PA
200. Joanne Schmalzried. Walnut Creek MS, Erie, PA
201. Kasey DeDad. Walnut Creek MS, Erie, PA
202. Bryan Mazzone. Walnut Creek MS, Erie, PA
203. Timmy Kalivoda. Walnut Creek MS, Erie, PA
204. Stephanie Pettinato. Walnut Creek MS, Erie, PA
205. Ashley Barron. Walnut Creek MS, Erie, PA
206. Brandon Rhodes. Walnut Creek MS, Erie, PA
207. Kaylee Bagnoni. Walnut Creek MS, Erie, PA
208. Natasa Milicevic. Walnut Creek MS, Erie, PA
209. Lindsay Egg. Walnut Creek MS, Erie, PA
210. Louis DiSanti. Walnut Creek MS, Erie, PA
211. Kyle Rectenwald. Walnut Creek MS, Erie, PA
212. Jeremy Davis. Harbins ES, Dacula, GA
213. Kelly Hickin. Walnut Creek MS, Erie, PA
214. Alex McMullen. Norcross ES, Norcross, GA
215. Janai Johnson. Norcross ES, Norcross, GA
216. Brenton Brown. Norcross ES, Norcross, GA
217. Cody Bailey. Norcross ES, Norcross, GA
218. Emmanuel Twum. Norcross ES, Norcross, GA
219. Ashley Silvis. Walnut Creek MS, Erie, PA
220. Allison Breese. Walnut Creek MS, Erie, PA
221. Adam Southard. Coffenberry MS, Myrtle Creek, OR
222. Aaron Sargeant. Laura Richards ES, Gardiner, ME
223. Olivia Clukey. Laura Richards ES, Gardiner, ME
224. Andrew Wagner. A.B. Dixon ES, Richmond, BC, Canada
225. Daniel Hermansson. Persboschool, Skultuna, Sweden