Question

In the following question select the related number from the given alternatives. 256:290::961:? (a)1011 (b)1017 (c)1023 (d)1025​

Answer 1

Answer: 1025

Step-by-step explanation:

256=(16)Square:290=(16) Square+(17×2) :: 961=(31) Square: 1025=(31) Sqaure + (32×2)

Answer 2

(d) 1025

256 = ( 16 )²

290 = 289 + 1 = ( 17 )² + 1

= (16 + 1 )² + 1

961 = ( 31 )²

1025 = ( 1024 + 1 ) = ( 32 )² + 1

= ( 31 + 1 )² + 1

Therefore, 256:290::961:1025

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