Question

complete the series. 9,225,25,169,49,?,81​

Answer 1

let him separate in two group

i) 9,_,25,_,49,_,81 (one and two digit numbers)

ii)_,225,_,169,_,?( three digit numbers)

9 + 16 =25 (16÷2=8)

(16+8=24)

25+24=49

(24+8=32)

49+32=81

ii)225-56=169 (56÷2=28)

(56+28=84)

169-84=85

is this right answer please tell