Select the option that is related to the fifth term in the same way as the second term is related to the first term and fourth term related to third term.
11 : 1309 :: 15 : 3345 :: 7 : ?
Answer & explanation
Correct answer: option 1
11 : 1309 :: 15 : 3345 :: 7 : ?
The logic Followed here is
Ist number × (First term2 - 2) = IInd number
As
11 × (112 - 2)
= 11 × (121- 2)
= 11 × (119)
= 1309
And
15 × (152 - 2)
= 15 × (225 - 2)
= 15 × (223)
= 3345
Similarly
7 : ?
7 × (72 - 2)
= 7 × (49 - 2)
= 7 × (47)
= 329