We have 64 : 9 : : 81 : ?√ 64 = 8The next number to 8 is9, √ 81 = 9 the next number to9 is 10.Hence, the answer i.e. 64 : 9 : : 81 : 10 ...

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Properties of Addition and Subtraction of Integers

64 : 9 : : 81...

Question

$64 : 9 : : 81 : ?$

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Solution

We have-
$64 : 9 : : 81 : ?$
$\sqrt 64 = 8$ The next number to $8$ is $9, \sqrt 81 = 9$ the next number to $9 i s 10 .$
Hence, the answer i.e. $64 : 9 : : 81 : 10$

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{[(64)^{- 3} \times (81)^{- \frac{9}{4}}]}^{- \frac{1}{9}}

The number of 5 digited numbers in which no two consecutive digits are identical is

A) 9(81^2) B) (64)^3 C) 9(64)^2 D) 120

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