The Sense of an Ending: Julian Barnes

 1)     What is the meaning of phrase ‘Blood Money’ in Veronica’s reply email?

The phrase 'Blood Money' can have meanings like, relationship with Sarah caused Adrian's suicide. And her money is given to Tony. Their relationship damages young Adrian's life so it can be called Blood Money and Tony is cause of all damages so Veronica call his (given) money as 'Blood Money'.it also shows some relations like Sarah Ford  is responsible for Adrin's suicide so that’s why Veronica called Blood money.

2)     How do you decipher the equation: b = s – v x/+ a1 or a2 + v + a1 X s = b?

It is the equation Tony found it in the diary page of Adrian. Earlier in the novel Adrian use it to demonstrate chain of responsibility. I would decipher it as,

 >>b = s – v x/+ a1 or a2 + v + a1 X s = b.. Here  b = s – v x/+ a1 where b stands for baby and which is the result of Sarah and here included V as a Veronica because she leaves Adrian so then it comes multiplied and addition in addition in Adrian that is ‘a1’ and Sarah that is ‘s’’s relation, then comes baby. a2 + v + a1 X s = b? here a2 is stands for Anthony and V for Veronica and a1 stands for Adrian Finn and S for Sarah Ford and B for Baby so we can say that characters of the novel connected with baby.

 Adrian was able to meet Sarah only because he was boyfriend of Veronica, And it is Anthony/Tony who suggests Adrian to meet Sarah. Thus not only Adrian and Sarah are responsible for the retarded child, but it is collective action of all these characters which resulted in the birth of a child.

3)   What do you mean by Unreliable Narrator? Is Tony Webster classifiable as Unreliable Narrator?

This novel's narrative technique is very different and we can't rely  on this technique it is unreliable  Unreliable narrator is one whose narration cannot take as reliable or whose narration is not faithful to reality. Here Tony Webster classifiable as unreliable narrator because there are many point which suggest that Tony himself clarified that he aren’t reliable. 

For Example-

“I remember, in no particular order”

The whole novel based on the memory of Tony but he himself said that he wasn’t sure about his memory. Moreover, he said that the story of his is out of impression.