Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
9 : 109 :: 7 : 71 :: 13 : ?
Answer & explanation
Correct answer: option 4
Pattern followed is :
(First number + 1)2 + First number = Second number
So, following the same pattern, we have
9 : 109 :: 7 : 71
(9 + 1)2 + 9 = 109 (7 + 1)2 + 7 = 71
Similarly ,
13 : ?
(13 + 1)2 + 13 = 196 + 13 = 209
209 , is correct answer .