Table:
0
A
B
C
D
E
1
concert id
concert name
theme
stadium id
year
2
1
Auditions
Free choice
1
2014
3
2
Super bootcamp
Free choice 2
2
2014
4
3
Home Visits
Bleeding Love
2
2015
5
4
Week 1
Wide Awake
10
2014
6
5
Week 1
Happy Tonight
9
2015
7
6
Week 2
Party All Night
7
2015

Questions and formulas:
Question: How many concerts are there in year 2014 or 2015?
Formula: ROWS(FILTER(A1,(E1=2014)+(E1=2015)))
Formula2: ROWS(FILTER(A2:A7,(E2:E7=2014)+(E2:E7=2015)))
Level: easy
Question: How many concerts occurred in 2014 or 2015?
Formula: ROWS(FILTER(A1,(E1=2014)+(E1=2015)))
Formula2: ROWS(FILTER(A2:A7,(E2:E7=2014)+(E2:E7=2015)))
Level: easy
Question: Which year has most number of concerts?
Formula: TAKE(SORT(SUMMARIZE(E1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(E2:E7,SUMX(A2:A7)), 2, -1), 1)
Level: hard
Question: How many concerts were held in 2014 and 2015?
Formula: SUM(FILTER(A1, (Year(E1)=2014)+(Year(E1)=2015)))
Formula2: SUM(FILTER(A2:A7, (Year(E1)=2014)+(Year(E1)=2015)))
Level: easy
Question: Number of concerts from 2014 or 2015
Formula: SUM(FILTER(A1, (Year(E1)=2014)+(Year(E1)=2015)))
Formula2: SUM(FILTER(A2:A7, (Year(E1)=2014)+(Year(E1)=2015)))
Level: easy
Question: The year when most concerts were held.
Formula: TAKE(SORT(SUMMARIZE(E1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(E2:E7,SUMX(A2:A7)), 2, -1), 1)
Level: hard
Question: How many concerts are held in 2014 or 2015?
Formula: SUM(FILTER(A1, (Year(E1)=2014)+(Year(E1)=2015)))
Formula2: SUM(FILTER(A2:A7, (Year(E1)=2014)+(Year(E1)=2015)))
Level: easy
Question: How many concerts were held in 2014 and 2015?
Formula: SUM(FILTER(A1, (Year(E1)=2014)+(Year(E1)=2015)))
Formula2: SUM(FILTER(A2:A7, (Year(E1)=2014)+(Year(E1)=2015)))
Level: easy