Bissoy.com
Doctors Medicines MCQs Q&A

Ram bought some pens at 5 Rs. per pen and some pencil at 4 Rs. per pencil. If he spent a total of 150 Rs. , How many pencil could have he bought?

Ram bought some pens at 5 Rs. per pen and some pencil at 4 Rs. per pencil. If he spent a total of 150 Rs. , How many pencil could have he bought? Correct Answer 15

Let no. of pens and pencil bought be x and y respectively

⇒ 5x + 4y = 150

⇒ x = (150 - 4y)/5

As, x is a integer

⇒ y is a multiple of 5

∴ in the options only 15 is a multiple of 5

Related Questions

The pie chart given below shows the amount spent by a boy on the purchase of six different items. The total amount spent on all these six items is Rs. 54000. The amount spent on a specific item is represented as a degree with reference to the total amount spent on all these six items. Which of the following statement(s) is/are correct? I. The amount spent on article A is Rs.900 less than the amount spent on article B. II. The amount spent on article C is Rs 2400 more than the amount spent on article D. III. The ratio of the amount spent on article B to the amount spent on article E is 4 : 1.
The following question has three statements. Study the question and the statements and decide which of the statement(s) is necessary to answer the question. A stationary store had blue, black and red pens in the ratio 9 ∶ 8 ∶ 1. How many total pens did the store had? I. If 200 blue pens and 100 black pens were sold, the ratio becomes 5 ∶ 6 ∶ 1. II. If 50 blue and 50 red pens were bought, the ratio becomes 5 ∶ 4 ∶ 1. III. If 50 black pens were sold and 100 red pens were bought, the ratio becomes 9 ∶ 7 ∶ 3.
At a stationary shop, it costs Tk. 185 for 4 gel-pen, 8 ball -point pens and 1 marker pen and Tk. 315 for 7 gel-pens, 15 ball point pens and 1 marker pen. What would be the cost of 1 gel-pen, 1 ball -point pen and 1 marker pen?
With the help of a pointer the teacher points three red pens and two blue pencils lying on the table. Pointing to one pencil he says, "This pencil is blue". He then points two pens and says, "These pen are red". He takes one pen in his hand and while putting one pencil in his pocket says, "I have one pen in my hand and I am now putting pencil in my pocket". The above illustration best describes which one of the following approach to teaching-
In a box, the number of sketch pens is 20% more than the number of ball pens, then number of pencils is 25% less than the number of ink-pens. Total number of ball pens and pencils are equal in number and difference in number of ink-pens and number of sketch pens is 20. The number of sketch pens is what percent of total number of all four items in a box?
A box contains a certain number of pens of different prices. There is N number of blue pens of Rs. 25 each, the number of red pens for Rs. 30 each are 20 less than blue pens. The price of Green pens is Rs. 10 each which is 50 less than the red pens. Total price of box is Rs. 3900 then find total number of pens in box.
Ram spent Rs. 564 to buy pens and pencils. If each pen costs Rs. 7 and each pencil Rs. 3, and if the total number of pens and pencils bought was 108, how many pens did he buy?
In a box, there are 40 pens in total in four different colors. There are 12 red pens, 9 blue pens, 10 green pens and 9 black pens. If two pens are chosen at random, what is the chance of getting same color pens?
There are six students, P, Q, R, S, T, and U who have a different number of pens - 2, 4, 5, 7, 9, and 12 (not necessarily in the same order). The number of pens Q has is a prime number. U has 2 more pens than Q. The number of pens R has is a multiple of 4 but not a multiple of 3. P has fewer pens than Q, but has more pens than S. Who has the second highest number of pens?
There are six students, P, Q, R, S, T and U who have a different number of pens - 2, 4, 5, 7, 9 and 12 (not necessarily in the same order). The number of pens Q has is a prime number. U has 2 more pens than Q. The number of pens R has is a multiple of 4 but not a multiple of 3. P has fewer pens than Q but has more pens than S. Who has the highest number of pens?