Find the odd one out.
6 10 14 18 22

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Solution

When we divide each number by 2 we get a prime quotient except in case of 18 When 18 is divided by 2 we get the quotient as 9 which is not prime number In fact 9 is a perfect square.
Hence 18 is the odd man.

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Class-intervals	$6 - 10$	$10 - 14$	$14 - 18$	$18 - 22$	$22 - 26$	$26 - 30$
Frequency	$4$	$6$	$9$	$12$	$7$	$2$

Class interval	10-14	14-18	18-22	22-26	26-30	30-34	34-38	38-42
Frequency	8	6	11	20	25	22	10	4

10, 19, 22, 16, 15, 18, 20, 18, 14, 18, 23

$x$	$14$	$18$	$22$	$25$	$30$
$f$	$7$	$10$	$12$	$16$	$5$

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