self Maths Puzzle

find next term
"1,3,9,31,129,?"

Read Solution (Total 1)

1
3 = 1 *1 + 2
9 = 3 *2 + 3
31 = 9 *3 + 4
129 = 31 *4 + 5
651 = 129 *5 + 6

Answer: 651
10 years agoHelpfull: Yes(11) No(0)

self Other Question

can you know any two number of all ones when multiplied and added should give the same answer. (example 1 and 11 when multiplied gives 11, addition gives 12 this also not provide same answer)find the two numbers which satisfies this condition. 3,20,63,144,275 ?