1.

The teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7. The highest mark is 87. What is the lowest mark?

Answer»

Let the Lowest mark of the class = x 

Twice the least mark = 2x 

On adding 7 = 2x + 7 

By problem; 2x + 7 = 87 

2x = 87 – 7 

2x = 80 

x = 80/2 = 40 

x = 40 

∴ The lowest mark = 40



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