Question

Find the missing number in the following series:
43, 172, 86, 344, ?

A) 172 B) 258 C) 129 D) 430

Answer 1

Answer:

it Option B . 258

Step-by-step explanation:

hope it helps...

Answer 2

Answer:

Find the missing number in the following series:

43, 172, 86, 344, ?

A) 172

B) 258

C) 129

D) 430

Correct answer is option (A) 172

Step-by-step explanation:

• The series can be split into two parts by picking up alternative numbers from starting

The first series -  43, 86,?

The second series - 172, 344

• The first series follows the rule of doubling each consecutive number.

For the double of 43 is 86 and the double of 86 is 172

⇒  43 X 2 = 86

⇒   86 X 2 = 172

⇒   172 X 2 = 344 and so forth.

The first series will be 43, 86, 172, 344.........

but we need the third number of the series to find our answer.

Hence the correct answer will be 172 that is option (A)

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