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shown in the pairs

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by sanju09 » Sat Jul 24, 2010 3:21 am
Which of the following describes the relationship between A and B as shown in the pairs of numbers in the table below?
A. B = A + 4
B. B = 2 A + 1
C. B = 3 A - 1
D. B = A² + 1
E. B = A² - 1

[spoiler]Source: majortests.com[/spoiler]
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Source: — Problem Solving |

by selango » Sat Jul 24, 2010 3:28 am
Choose first pair and check with the options

A=2 and B=5

Options B,C and D work.

Choose second pair

A=3,B=10

Option D alone work.

Pick D

Quick approach:

If we closely look A and B,it ll in B=A^2+1
--Anand--
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