Question

Look at this series: 544, 509, 474, 439, ... What number should come next?

Answer 1

it is ARITHMETIC PROGRESSION
common difference is same b/w all terms
d=-34
an =a1+(n-1)d
a5=a1+4d
a5=544+4(-35)
a5 =404
which is required

Answer 2

Answer:

404

Explanation:

544, 509, 474, 439, ...

This series is in Arithmetic progression ( A. P )

The general form of an Arithmetic Progression is a, a + d, a + 2d, a + 3d ..

Thus nth term of an AP series is Tn = a + (n - 1) d

Here,

a = 544

d is the difference between two terms.

Therefore,

d = 509-544 = -35

Tn =a+(n-1)d

n is the number of terms,

Therefore,  n =5

Tn=a+4d

Tn=544+4(-35)

Tn =404