Originally Posted by Innila Hi, What is the next number in this series 5, 25, 61, 113, 181, ???, ..... (This could be simple for so many of u ) What is the next number in this series 5, 25, 61, 113, 181, ???, . The ans is 265. Solutions: 1^2+2^2 = 1 +4 = 5 3^2+4^2 = 9+16 = 25 5^2+6^2 = 25+36 = 61 7^2+8^2 = 49+64 = 113 9^2+10^2 = 81+100 = 181 Now 11^2 + 12^2 = 121+144 = 265
Forum Rules