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The nth term of a sequence is 12n - 5

Work out the numbers in the sequence that have two digits and are NOT prime.

The nth term of a sequence is 12n 5 Work out the numbers in the sequence that have two digits and are NOT prime class=

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sqdancefan

9514 1404 393

Answer:

  55, 91

Step-by-step explanation:

The 2nd through 8th numbers in the sequence are the 2-digit numbers ...

  19, 31, 43, 55, 67, 79, 91

Of these, the ones that are composite (not prime) are ...

  55 = 5·11

  91 = 7·13

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