Question

A total of 100 match sticks were used in making a number 20 times, then with 10 match sticks the number can be made .

• A. once
• B. twice
• C. thrice

Answer 1

The correct option is B twice

Let the number of match sticks required to make the number once be $n$.
If the number is made 20 times, then the number of sticks will be $n\times 20$
According to the question,
$n\times 20=100$
$n=\frac{100}{20}$
$n=5$
Now, let the number of times the number can be made using 10 match sticks be $x$
So, $5\times x=10$
$x=\frac{10}{5}$
$x=2$
So , the number can be repeated twice with 10 match sticks.