Q3.

Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
DAC, GWH, JSM, MOR, ?

Q4.

Select the letter-cluster from among the given options that can replace the question mark (?) in the following series:
DAPR, FESU, HIVX, JMYA ?

Q5.

Find the two signs to interchange to correct the equation.
\(30 - 12 \div 3 \times 2 + 4 = 122\)