Question

7, 9, 21, 68, 279, ?
a) 1404
b) 1406
c) 1405
d) 1401
which option is right ...please explain in detail
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Answer 1

Answer:

(B) 1406

Step-by-step explanation:

7×9×21×68×279 =(B) 1406

Answer 2

Answer:

1404

Step-by-step explanation:

7 9 21 68 279 ?

7*1+2= 9

7*1+2= 9 9*2+3= 21

21*3+5=68

68*4+7=279

279*5+9=1404