Question

Which of the following numbers are not divisible by $3$?
$42,73,84,105,314$

• A. $42$
• B. $73$
• C. $84$
• D. $314$

Answer 1

Answer: (B), (D)

The correct options are
B $73$
D $314$

We use a rule to check whether the number is divisible by 3 or not.

A number is divisible by 3 if the sum of the digits is evenly divisible by 3.

A. $4+2=6$, divisible by 3

B. $7+3=10$, not divisible by 3
C. $8+4=12$, divisible by 3
D. $3+1+4=8$, not divisible by 3.