Question

The average

of 81 consective even numbers 124. Then find the largest number and 67th number​

Answer 1

Answer:

Average of 81 numbers is 124. So there sum will be 124*81.

For an AP,

Sum = (n/2)*[(2*a) + (n-1)*d] - - - ---- (equation 1)

n = 81

a = unknown

d = 2

Sum = 81*124 = 10044

Substitute these values in equation 1

You will get a = 44

Now,

Largest term = 81st term = 44 + (81-1)*2 = 204

67th term = 44 + (67-1)*2 = 176

Explanation: