Table:
0
A
B
C
D
E
F
G
H
1
model name
launch year
ram mib
rom mib
slots
wifi
bluetooth
chip model
2
X5
2002
32
32
1CFII,1SD
No
No
3
X5 high end
2002
64
48
1CFII,1SD
No
No
4
X3 Basic
2003
32
32
1SD
No
No
5
X3 Advanced
2003
64
64
1SD
No
No
6
X3i
2003
64
64
1SD
802.11b
No
7
X30 low-end
2004
32
32
1SD
No
No
8
X30 mid-range
2004
64
64
1SD
802.11b
1.1
9
X30 high-end
2004
64
64
1SD
802.11b
1.1
10
X50 Standard
2004
64
64
1CFII,1SD
No
Yes
11
X50 Advanced
2004
64
128
1CFII,1SD
802.11b
Yes
12
X50v
2004
64
128
1CFII,1SD
802.11b
1.2
13
X51 low-end
2005
64
128
1CFII,1SD
No
1.2
14
X51 mid-range
2005
64
128
1CFII,1SD
802.11b
1.2
15
X51v
2005
64
256
1CFII,1SD
802.11b
1.2

Questions and formulas:
Question: the names of models that launched between 2002 and 2004.
Formula: FILTER(A1,(B1>=2002)*(B1<=2004))
Formula2: FILTER(A2:A15,(B2:B15>=2002)*(B2:B15<=2004))
Level: easy
Question: Which model has the least amount of RAM?
Formula: TAKE(SORT(SUMMARIZE(A1,SUMX(C1)), 2, 1), 1)
Formula2: TAKE(SORT(SUMMARIZE(A2:A15,SUMX(C2:C15)), 2, 1), 1)
Level: hard
Question: Find the details for all chip models.
Formula: A1
Formula2: A2:A15
Level: easy
Question: Count the number of chip model that do not have wifi.
Formula: ROWS(UNIQUE(FILTER(H1, (ISBLANK(F1))+(F1=""))))
Formula2: ROWS(UNIQUE(FILTER(H2:H15, (ISBLANK(F2:F15))+(F2:F15=""))))
Level: hard
Question: List all the model names sorted by their launch year.
Formula: SORTBY(A1,B1,1)
Formula2: SORTBY(A2:A15,B2:B15,1)
Level: easy
Question: All chip models
Formula: UNIQUE(H1)
Formula2: UNIQUE(H2:H15)
Level: easy
Question: How many chip models don't support wifi?
Formula: ROWS(UNIQUE(FILTER(H1, F1="No")))
Formula2: ROWS(UNIQUE(FILTER(H2:H15, F2:F15="No")))
Level: medium
Question: model names by launch year in chronological order
Formula: SORT(UNIQUE(HSTACK(A1,B1)), 2, 1)
Formula2: SORT(UNIQUE(HSTACK(A2:A15,B2:B15)), 2, 1)
Level: medium
Question: Names of models launched between 2002 and 2004.
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:H1,(Year(B1)<2005)*(Year(B1)>=2002)),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:H15,(Year(B1)<2005)*(Year(B1)>=2002)),1))
Level: medium
Question: Names of models which were launched between 2002 and 2004.
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:H1,(Year(B1)<2005)*(Year(B1)>=2002)),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:H15,(Year(B1)<2005)*(Year(B1)>=2002)),1))
Level: medium
Question: the chip model.
Formula: UNIQUE(H1)
Formula2: UNIQUE(H2:H15)
Level: easy
Question: Model names by launch years from earliest to latest.
Formula: SORT(UNIQUE(HSTACK(A1,B1)), 2, 1)
Formula2: SORT(UNIQUE(HSTACK(A2:A15,B2:B15)), 2, 1)
Level: medium