Were Robert Hooke and Isaac Newton alive at the same time?
Yes. Robert Hooke and Isaac Newton were alive at the same time for 60 years, from 1642 to 1703.
Robert Hooke was 7 when Isaac Newton was born.
Isaac Newton was 60 when Robert Hooke died, aged 67.
Robert Hooke
English natural philosopher, architect and polymath
Born 18 July 1635 (Julian calendar) · died 3 March 1703 (Julian calendar), aged 67
Isaac Newton
English mathematician and physicist
Born 25 December 1642 (Julian calendar) · died 20 March 1727 (Julian calendar), aged 84