Question

One of the number of the following is wrong
which one is it?
9 10 22 69 281 1405 8436

Answer 1

what class is this for?

Answer 2

its a sat question

Answer 3

is it 281?

Answer 4

reason?

Answer 5

give the logic @surjithayer

Answer 6

what about 1405 and 8436?

Answer 7

9*1+1=10
10*2+2=22
22*3+3=69
69*4+4=28
280*5+5=1405
1405*6+6=8436
an-1*n+n=an

Answer 8

69*4+4=280

Answer 9

so the answer is 281 and u rock man