উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
7
Numbers at odd positions form a different series as well as the numbers at even positions.
Series formed by the numbers at odd positions = 1, 2, 3, 4, 5,.........
Series formed by the numbers at even positions = 3, 4, 5, 6, 7.........
So, the next number in the series is 7.