Advertisements
Advertisements
प्रश्न
Look at this riddle?
If she answers the riddle correctly how ever will she pay for the pencils?
Advertisements
उत्तर
Let, the cost of one pencil be ₹ x.
Now, the cost of such 7 pencils will be ₹ 7x and of 5 pencils will be ₹ 5x.
It is given that cost of 7 pencils is ₹ 6 more than the cost of 5 pencils.
Therefore, we get the following equation
7x – 5x = 6
⇒ 2x = 6
⇒ `(2x)/2 = 6/2` ...[Dividing both sides by 2]
⇒ x = 3
Since, the cost of one pencil is ₹ 3.
So, the cost of 10 pencils = 3 × 10 = ₹ 30
Thus, she has to pay ₹ 30 for 10 pencils.
APPEARS IN
संबंधित प्रश्न
Set up equation and solve them to find the unknown number in the following case:
Add 4 to eight times a number; you get 60.
Set up equation and solve them to find the unknown number in the following case:
If I take three-fourths of a number and add 3 to it, I get 21.
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 score is 87. What is the lowest score?
Sum of two numbers is 81. One is twice the other.
The equation formed is ______.
In a Mathematics quiz, 30 prizes consisting of 1st and 2nd prizes only are to be given. 1st and 2nd prizes are worth ₹ 2000 and ₹ 1000, respectively. If the total prize money is ₹ 52,000 then show that:
The number of 1st prizes are ______ and the number of 2nd prizes are ______.
Mohan is 3 years older than Sohan. The sum of their ages is 43 years.
A number when divided by 6 gives the quotient 6. What is the number?
Thrice a number decreased by 5 exceeds twice the number by 1. Find the number.
In a certain examination, a total of 3768 students secured first division in the years 2006 and 2007. The number of first division in 2007 exceeded those in 2006 by 34. How many students got first division in 2006?
The three scales below are perfectly balanced if • = 3. What are the values of ∆ and * ?
| a. |  |
| b. |  |
| c. |  |
