Question

2,7,12,17....... 57 Find 'n'?

Answer 1

Hi there!

Here First term, a = 2

Commomn difference, d = 7-2 = 5

Last term, l = 57

l = a + (n-1)d

57 + 2 + (n-1)5

n-1 = 55/5

n = 11+1

n = 12

Hence,
No. of terms, n = 12

Cheers!

Answer 2

Number of terms are 12