30,10,60,20

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LET n be the position of a number in the series

If n is odd

rule is

N = No +15*(n-1)

N= 30 + 15*(n-1

IF n IS EVEN THEN

the rule is

N = 5* n

the fith number will thus be

N = 30+ 15(5-1)

= 30 +60

= 90

the sixth number will be

N= 5*n

= 5*6

=30

what the rule

need clarification

RULE IS

AND N is the actual number

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