Word Problem: A bus was carrying 48 passengers. After 16 children alighted from the bus and 10 adults boarded the bus, there were twice as many adults as children. Find out the number of children in the bus at first. Using algebra Let u = number of children at the end 3u = 48 + 10 – 16 = 42 u = 42 ÷ 3 = 14 number of children at first = 14 + 16 = 30 Another way is to use bar model to illustrate the problem before solving. Solution:Top School Exam Paper Grade 4 Whole Numbers Is there any simpler way to solve it without using any algebra or bar models. Or should this type of question be excluded from year 4?