(CNN) A 3-year-old Malaysian boy living in the UK has become the youngest member to join Mensa UK, the largest and oldest international high IQ society in the world, Mensa officials said.

Muhammad Haryz Nadzim was invited to join Mensa after meeting with a psychologist and scoring 142 on the Stanford-Binet IQ test, placing him in the 99.7th percentile, his mother, Nur Anira Asyikin, told CNN.

"Well done to Haryz on his invitation to join Mensa," John Stevenage, the chief executive of British Mensa, said in a statement to CNN. "He is obviously a very bright young man and we are delighted to welcome him to Mensa."

To become a member of British Mensa, an individual must "demonstrate an IQ in the top two per cent of the population," according to their website

The supervised Mensa IQ test is designed for children and adults above 10 and a half years old. For children less than 10 years, they have to be assessed by an educational psychologist to determine their IQ score.

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