Question

Find square root of 289 with successive subtraction

Answer 1

289-1=288
288-3=285
285-5=280
280-7=273
273=9=264
264-11=253
253-13=240
240-15=225
225-17=208
208-19=189
189-21=168
168-23=145
145-25=120
120-27=93
93-29= 64
64-31=33
33-33=0 ....total 17 steps...so 17 is the answer