1. The prophecy
Matthew says that Judas' payment and death were prophesied by Jeremiah, and then he quotes Zechariah 11:12-13 as proof!
2. Thirty pieces of silver
According to Matthew 26:15, the chief priests "weighed out thirty pieces of silver" to give to Judas. There are two things wrong with this:
a. There were no "pieces of silver" used as currency in Jesus' time - they had gone out of circulation about 300 years before.
b. In Jesus' time, minted coins were used - currency was not "weighed out."
By using phrases that made sense in Zechariah's time but not in Jesus' time Matthew once again gives away the fact that he creates events in his gospel to match "prophecies" he finds in the Old Testament.
3. Who bought the Field of Blood?
a. In Matthew 27:7 the chief priests buy the field.
b. In Acts 1:18 Judas buys the field.
4. How did Judas die?
a. In Matthew 27:5 Judas hangs himself.
b. In Acts 1:18 he bursts open and his insides spill out.
c. According to the apostle Paul, neither of the above is true. Paul says Jesus appeared to "the twelve" after his resurrection. Mark 14:20 makes it clear that Judas was one of the twelve.
In Matthew 19:28, Jesus tells the twelve disciples, including Judas, that when Jesus rules from his throne, they will sit on twelve thrones judging the twelve tribes of Israel.
5. How did the Field of Blood get its name?
a. Matthew says because it was purchased with blood money (Matthew 27:6-8).
b. Acts says because of the bloody mess caused by Judas' bursting open (Acts 1:18-19).
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