Question

One student is asked to divide a half of a number by 6 and other half by 4 and then to add the two quantities. Instead of doing so the student divides the given number by 5. If the answer is 4 short of the correct answer then the number was

Answer 1

Let no be x
Given
$\frac{1}{6} \times \frac{x}{2} + \frac{1}{4} \times \frac{x}{2}$
what student did
$\frac{x}{5}$
It means
$\frac{x}{5} = \frac{x}{12} + \frac{x}{8} - 4$
x/12+x/8-x/5=4

lcm of 5,8,12 =120

10x +15x -20x / 120 =4
x=120×4
x=480

so the answer is

480/2 ×1/6 + 480/2 × 1/4 = 100

Answer 2

Answer:

480

Step-by-step explanation:

hope this will help you