Am I completely missing something here, the question is as follows

Need to find bid-offer on the NZD/GBP cross-rate implied by Exhibit 1 is *closest to:*

Way I solved it is below : My approach is to get at NZD/GBP = NZD/EUR x EUR/GBP.

Breaking down into steps (so you can help spot my error!)

→ EUR/NZD given as 1.7014/1.7018. Which means inverting to get NZD/EUR = (1/1.7018) / (1/1.7014)

So, NZD/EUR = 0.5876/0.5878…a

→ GBP/EUR given as 0.8593/0.8594. Which means inverting to get EUR/GBP= (1/0.8594) / (1/0.8593)

So, EUR/GBP= 1.1636/1.1637…b

Multiplzing a and b = NZD/GBP = 0.6837/0.6840

What did I mess up ?