Table:
0
A
B
C
D
E
1
Episode Number
Location
Original Airdate
Challenge Winner
Challenge
2
1
Amarillo, Texas
December 3, 2008
Man
Big Texan Challenge, a 4.5 pound (2kg) steak
3
3
Pittsburgh, Pennsylvania
December 10, 2008
Man
Atomic Hot Wings Challenge
4
5
Austin, Texas
December 17, 2008
Food
Eight Don Juan El Taco Grande breakfast tacos
5
6
Chicago, Illinois
December 24, 2008
Man
Three overstuffed sandwiches
6
8
Boston, Massachusetts
January 14, 2009
Food
12-pound Eagle Challenge Burger
7
9
New York, New York
January 21, 2009
Man
Spicy Phaal (the hottest curry in the world)
8
10
New Orleans, Louisiana
January 28, 2009
Man
15 dozen oysters
9
12
Seattle, Washington
February 11, 2009
Food
Southwestern Exposure, a twelve-egg omelette
10
14
St. Louis, Missouri
February 25, 2009
Food
5 24-oz. Milkshakes (Broken into 15 8-oz. glasses)
11
16
Denver, Colorado
March 11, 2009
Food
7-pound monster breakfast burrito

Questions and formulas:
Question: What is the original airdate of the episode where the challenge was three overstuffed sandwiches? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="Three overstuffed sandwiches"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,E2:E11="Three overstuffed sandwiches"),3))
Level: medium
Question: Who was the challenge winner in the episode that originally aired on January 28, 2009?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="January 28, 2009"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,C2:C11="January 28, 2009"),4))
Level: medium
Question: What is the original airdate of the episode where the challenge is "Southwestern Exposure", a twelve-egg omelette"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="Southwestern Exposure, a twelve-egg omelette"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,E2:E11="Southwestern Exposure, a twelve-egg omelette"),3))
Level: medium
Question: How many episodes had New York, New York as the location?
Formula: SUMIFS(A1,B1,"New York, New York")
Formula2: SUMIFS(A2:A11,B2:B11,"New York, New York")
Level: easy
Question: What is the original airdate of the episode where the challenge is a "7-pound monster breakfast burrito"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="7-pound monster breakfast burrito"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,E2:E11="7-pound monster breakfast burrito"),3))
Level: medium