Question

find the next number in the series 7,15,44,150,620,?​

Answer 1

Answer:

how to 3120

please explained

Answer 2

Answer:

The unknown term will be 3120.

Step-by-step explanation:

The given number series is,

7, 15, 44, 150, 620, ?

From the series -

The second term will be -

$15 = 7\times1 + (1\times8)$

Third term -

$44 = 15\times2 + (2\times7)$

Fourth term -

$150 = 44\times3+(3\times6)$

Fifth term -

$620 = 150\times4+(4\times5)$

We are observing a pattern that if we are writing the nth term then, the previous number should be multiplied by (n-1) and added to the product

(n-1)(9-(n-1) = (n-1)(8-n).

So the unknown term will be -

$620\times 5 + (5\times4) = 3100 + 20 = 3120$

So the unknown term will be 3120.

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