Question

6, 40, ? 1812, 7240 Reasoning Number Series

Answer 1

Answer:

304

Step-by-step explanation:

The pattern followed here is:

*10-10, 8-8 6-6, x4-4

6 X 10 - 2 x 10;

= 60 - 20;

= 40

40 x 8 - 2 8;

= 320 - 16

= 304

304 x 6 - 2 x 6;

= 1825 - 12;

= 1813

1813 x 4 - 2 x 4;

= 7252-8

= 7246

Hence 304 will replace the question mark.

Answer 2

Given :

6, 40, ? 1812, 7240

To Find : Missing Number

Solution:

6, 40, ? 1812, 7240

6

(6 - 2) * 10  =  40

(40 - 2) * 8  = 304

(304 - 2) * 6 = 1812

(1812 - 2) * 4  = 7240

Hence Missing number in series in 304

Logic  is    

Tₙ = (Tₙ₋₁ - 2) * 2( 7 - n)  where T₁ = 6

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