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Which number is missing from the sequence below? 5 7 8 O A 6 OB 41 ос M WA OD D. 9

Sagot :

The initial sequence is 5 7 8

there is a missing number that goes between 5 7 and 8

there are 4 numbers , the first one is 5 and the last one is 8

the general formula is An = A1 + (r) (n-1)

but in this special case we find by observation that

theres ONLY ONE number between 5 and 8

is not 4 , also not 9 because they are outside the group

also is not 8 because is repeated

then we have only one option remaining that is 6.

6 is the answer searched.

Now