n is a whole number which when divided by 4 gives 3 as remainder. What will be the remainder when 2*n is divided by 4 ?
A) 3 B) 2
C) 1 D) 0
A whole number n which when divided by 4
Answer: B) 2
Explanation:
Let n=4*q + 3. Then, 2*n = 8*q + 6 = 4(2*q + 1) + 2.
Thus when 2*n is divided by 4, the reminder is 2.
Subject: Numbers – Quantitative Aptitude – Arithmetic Ability