Table:
0
A
B
C
D
E
F
G
1
HR no.
HR name
CR no.
LMS no.
Built
Works
Withdrawn
2
70
River Ness
938
14756
9/1915
Hawthorn Leslie 3095
10/1939
3
71
River Spey
939
14757
9/1915
Hawthorn Leslie 3096
12/1936
4
(72)
(River Tay)
940
14758
11/1915
Hawthorn Leslie 3097
9/1945
5
(73)
(River Findhorn)
941
14759
11/1915
Hawthorn Leslie 3098
2/1939
6
(74)
(River Garry)
942
14760
12/1915
Hawthorn Leslie 3099
12/1946

Questions and formulas:
Question: What is the lowest cr number?
Formula: MIN(C1)
Formula2: MIN(C2:C6)
Level: easy
Question: When 2/1939 is the withdrawn when was it built?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,G1="2/1939"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G6,G2:G6="2/1939"),5))
Level: medium
Question: When river ness is the hr name what is the hr number?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,B1="River Ness"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G6,B2:B6="River Ness"),1))
Level: medium
Question: When (river garry) is the hr name how many builts are there?
Formula: ROWS(UNIQUE(FILTER(E1, B1="(River Garry)")))
Formula2: ROWS(UNIQUE(FILTER(E2:E6, B2:B6="(River Garry)")))
Level: medium
Question: What is the highest cr number?
Formula: MAX(C1)
Formula2: MAX(C2:C6)
Level: easy
Question: When river ness is the hr name how many builts are there?
Formula: ROWS(UNIQUE(FILTER(E1, B1="River Ness")))
Formula2: ROWS(UNIQUE(FILTER(E2:E6, B2:B6="River Ness")))
Level: medium