# answer of the number sequence 6,13,20,27?

Relevance
• Anonymous
2 years ago

• Login to reply the answers
• Just notice that you add 7 at each step, so next is 34

Another way is to identify the nth term as 1 + 7n

• Login to reply the answers
• 34

• Login to reply the answers
• a_n = -1 + 7n

• Login to reply the answers
• 34.

• Login to reply the answers
• The terms of the series are in increasing order with a common difference of 7. The next term of the series has to be 34..

• Login to reply the answers
• 6 ,13,20,27,...

The difference between terms is '7'

So the first part of the equation is '7n'

Since the first term (#1 = n) ends in '6' then we can write

7(n) + c = 6

7(1) + c = 6

7 + c = 6

c = -1

So the function is 7n - 1

Verify for say term (#3 = n)

7(3) - 1 = 21- 1 = 20 As agreed. !!!!

• Login to reply the answers
• Why are some people making this sound so complicated ?

.. or just giving the answer, which doesn't help to explain why.

Take the sequence .. 7 .. 14 .. 21 .. 28 .. 35 .. 42 .. 49 .. 56 .. 63 .. 70 .. etc etc

Which is 7 + 7 + 7 ... etc etc

It's that .... but MINUS one each time

6 .. 13 .. 20 .. 27.. 34 .. 41 .. 48 .. 55 .. 62 .. 69 .. etc etc

• Login to reply the answers
• a_n = 6 + (n - 1) * 7

• Login to reply the answers
• Un = 7n - 1

• Login to reply the answers