RRB NTPC Prelims Model Paper 2 with solutions

(4) According to the rules, when two numbers are multiplied having the same base, their exponents are added. On the other hand, when a number is divided by another number having same base, the Practice test 2 exponent value of the denominator is subtracted from the exponent of the numerator.So, $4^1\times 4^4÷4^2=4^1\times 4^{\left(4\mathit{–}2\right)}=4^{1+2}$
$=4^3$
Since $4^3=4?$
On comparing, ? = 3