Crossword clues for Number one number two 5 lettersAnswerClueADAMSNumber one number twoADAMS#1 number two who became the #2 number oneEYEDOCNumber one or number two? asker, informallyISOTONEOne of two nuclides with the same neutron number but different proton numbersNINENumber dialed before two onesSQUAREROOTOne of two for a positive numberHYPHENOne of two in a Social Security numberFOUROne of two in Hank Aaron's uniform numberSIXOne of two single-digit Yankee uniform numbers that aren't retired