Advertisements
Advertisements
Question
Look at this riddle?
If she answers the riddle correctly how ever will she pay for the pencils?
Advertisements
Solution
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
RELATED QUESTIONS
Irfan says that he has 7 marbles more than five times the marbles Parmit has. Irfan has 37 marbles. How many marbles does Parmit have?
Mohan is 3 years older than Sohan. The sum of their ages is 43 years.
A number divided by 2 and then increased by 5 is 9.
After 25 years, Rama will be 5 times as old as he is now. Find his present age.
The perimeter of a rectangle is 40 m. The length of the rectangle is 4 m less than 5 times its breadth. Find the length of the rectangle.
The sum of two consecutive multiples of 2 is 18. Find the numbers.
Two complementary angles differ by 20°. Find the angles.
The length of a rectangle is two times its width. The perimeter of the rectangle is 180 cm. Find the dimensions of the rectangle.
If one side of a square is represented by 18x – 20 and the adjacent side is represented by 42 – 13x, find the length of the side of the square.
What does a duck do when it flies upside down? The answer to this riddle is hidden in the equation given below:
If i + 69 = 70, then i = ? If 8u = 6u + 8, then u = ?
If 4a = –5a + 45, then a = ? if 4q + 5 = 17, then q = ?
If –5t – 60 = – 70, then t = ? If `1/4`s + 98 = 100, then s = ?
If `5/3`p + 9 = 24, then p = ______?
If 3c = c + 12, then c = ______?
If 3 (k + 1) = 24, then k = ______?
For riddle answer: substitute the number for the letter it equals
`()/1 ()/2 / ()/3 ()/4 ()/5 ()/6 ()/7 ()/8/()/4 ()/9`
