2012 · Q46
There are some benches in a class room having the number of rows 4 more than the number of columns. If each bench is seated with 5 students, there are two seats vacant in a class of 158 students. The number of rows is:
Elementary MathematicsArithmetic
- A4
- B8
- C6
- D10
Explanation
32 benches with rows = cols+4 gives cols = 4, rows = 8.