উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
25
Let us observe the sequence,
5,7,10,14,19
The difference between first 2 numbers = 7 - 5 = 2
The difference between next 2 numbers = 10 - 7 = 3
The difference between next 2 numbers = 14 - 10 = 4
The difference between next 2 numbers = 19 - 14 = 5
So logically, the difference between any two consecutive number is gradually increasing by 1.
Therefore difference between next 2 numbers should be 6
If x is the next number, then according to the above relation
x - 19 = 6
i.e, x = 19 + 6 = 25.