This includes the 21 of them that were freed in October last year in a deal brokered by the International Committee of the Red Cross and three others who escaped or were rescued.
According to the Nigerian government's Twitter feed, none of the 82 girls released on Saturday were among those returning to school in September as they were still undergoing medical and psychological treatment in the capital, Abuja, that should last two to three weeks.
Meanwhile, the girls that were freed on Saturday are still waiting to be reunited with their families.
The Nigerian minister of women affairs, Aisha Alhassan, told reporters that photographs of the girls had been sent to their families for identification. A government tweet quoted Alhassan as saying, "We will never prevent them from seeing their daughters."
Three years ago, the abduction of 270 girls from their secondary school by the Islamist militant group sparked global outrage and a celebrity-backed campaign #bringbackourgirls.
However, mediator and lawyer Zannah Mustapha said some of the abducted girls refused to be freed with the 82 girls last weekend, fuelling fears that they have been radicalized by the jihadists, and may feel afraid, ashamed or even too powerful to return to their old lives.