Ajakaiye was born in 1940 in the city of
Jos, the capital of
Plateau State in the northern region of Nigeria. She was the fifth of six children. Her parents believed in equal education of the sexes and distributed household chores among both the male and female children. In 1962 she is an alumna of
University of Ibadan with a degree in physics. She received a master's degree at the
University of Birmingham in
England, and in 1970 received her Ph.D. in geophysics from
Ahmadu Bello University in Nigeria. Originally interested in mathematics, Ajakaiye says she chose to pursue geophysics because she believed it could help her country. In 1971, she spoke at the third ICWES conference in Turin, giving a paper on women scientists and engineers in Nigeria, sharing a platform with
Letitia Obeng and
Grace Hopper. ==Career==