We are not told how old Nicodemus was in the Bible when speaking to Jesus, but he was probably over the age of 30.
Nicodemus
Saint Nicodemus was a Pharisee and a member of the Sanhedrin, who, according to the Gospel of John, showed favour to Jesus. He appears three times. Nicodemus visits Jesus one night to discuss his teachings with him. Technically, there is no place mentions when Saint Nicodemus born, but the same time with Jesus Christ.
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Nicodemus
nicodemus
The Pharisee, Nicodemus, came to Jesus by night.
St john
After the death of Jesus, Nicodemus came to assist with the burial. (John 19:39+40)
Nicodemus was a secret believer and this hindered him from learning more. Jesus taught him to embrace the kingdom of God.
Nicodemus' coming to Jesus at night signifies his curiosity and desire to learn more about Jesus without drawing attention from others. This encounter leads to a discussion on being born again and the spiritual rebirth, highlighting the importance of seeking and understanding spiritual truths.
Nicodemus .Answer: Joseph of Arimathea.