(informal) equals, is equal to, is equivalent to, entails

equal, equivalent, the same

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

a pentadecagon

fifteenth day of the month

five days in the week

(electronics) pentode (vacuum tube)

twenty-five; 25

thirty-five; 35

(archaic) fifty-six; 56