Question

$A$ is $3$ years younger than $C$ but one year older than $D.D$ is one year older than $B$ but $4$ years younger than $C.C$ is $15$ years old. What is the age of $B$ is years?

• A. $10$
• B. $11$
• C. $12$
• D. $13$

Answer 1

The correct option is A $10$

$A=C-3=D+1.....\left(1\right)$
$D=B+1=C-4....\left(2\right)$
$C=15$
$\therefore$ Solving these equation $B=10$.