Question

Select the correct alternatives from the given ones that will complete the series.
$43,172,86,344,?$

• A. $172$
• B. $258$
• C. $129$
• D. $430$

Answer 1

The correct option is A $172$

$43\stackrel{\times 4}{\to }172\stackrel{÷2}{\to }86\stackrel{\times 4}{\to }344\stackrel{÷2}{\to }172$.