Table:
0
A
B
C
D
E
1
Platform
Frequency (per hour)
Destination
Operator
Line
2
1
4
Highbury & Islington
London Overground
East London
3
1
4
Dalston Junction
London Overground
East London
4
1
4
London Bridge
Southern
Metro
5
2
4
Crystal Palace
London Overground
East London
6
2
4
West Croydon
London Overground
East London
7
2
2
London Victoria (Mon-Sat)
Southern
Metro
8
2
2
Caterham (Mon-Sat)
Southern
Metro
9
2
2
West Croydon (Peaks & Sun only)
Southern
Metro
10
2
2
Tattenham Corner (Sun only)
Southern
Metro

Questions and formulas:
Question: what is the platform when the frequency (per hour) is 4 and the destination is west croydon?
Formula: SUM(FILTER(A1, (B1=4)*(C1="west croydon")))
Formula2: SUM(FILTER(A2:A10, (B2:B10=4)*(C2:C10="west croydon")))
Level: easy
Question: what is the highest platform number when the frequency (per hour) is 4, the operator is london overground and the destination is west croydon?
Formula: MAX(FILTER(A1, (B1=4)*(D1="london overground")*(C1="west croydon")))
Formula2: MAX(FILTER(A2:A10, (B2:B10=4)*(D2:D10="london overground")*(C2:C10="west croydon")))
Level: easy