Question 1154862
Angad is 10 years older than Alex. Mark is 11 years younger than Alex. If the total of their ages is 68, how old is the youngest of them? 

Let Alex's age be x

Angad's age will be x+10

Add their ages

Mark's age will be x-11

x+x+10+x-11 =68

3x-1=68
3x=69
x=69/3 = 23

Angad will be 23+10 =33
Mark's age will be 23-11 =12