NIMCET 2019 Question Paper with solutions

The logic is :
1. $\left(10+10\right)-\left(8+7\right)=20-15=5$
2. $\left(21+9\right)-\left(12+12\right)=30-24=6$
3. $\left(8+4\right)-\left(4+1\right)=12-5=7$
Here, 5,6, and 7 are consecutive numbers.
Similarly,
4. $\left(7+1\right)-\left(2+4\right)=8-6=2$
5. $\left(9+3\right)-\left(6+3\right)=12-9=3$
Here, 2, and 3 areconsecutive numbers.
Hence, ' 3 ' is the correct answer.