(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 the same base, the exponent value of the denominator is subtracted from the exponent of the numerator. So, 41×44÷42 = 41×4(4–2) = 41+2 = 43 Since 43=4? On comparing, ? = 3