A=15 B=25 C=35… 15= A=15 B=25 C=35… 15 = how much

A=15 B=25 C=35… 15= A=15 B=25 C=35… 15 = how much


A



What's the rule of 5,15,25,35
Denoted by n


10n-5



15 * 15 =? 25 * 25 =? 35 * 35 =? 45 * 45 =? What are the rules of the calculated results?
Write your findings in words and calculate 95 * 95 with your findings


15*15=225
25*25=625
35*35=1225
45*45=2025
95*95=9×(9+1)×100+5×5=9025
The rule is n (n + 1) × 100 + 25