Skip to main content

Aptitude Day 327

Problems on Percentage:

1. 20% of the inhabitants of a village having died of cholera, a panic set in, during which 10% of the remaining inhabitants left the village. The population then reduced to720. Find the number of original inhabitants.

Solution:
                  (100-20)% of (100-10)% of x = 720

                 80/100 * 90/100 * x = 720.

                  x = 1000.

2. A salesman’s commission is 10% on all sales up to 10,000 and 5% on all sales exceeding this. He remits 20,000 to his parent company after deducting his commission. Find the total sales.

Solution:
                  x – [10% of 1000 + 5% of (x-1000)] = 20,000

                  x – [10/100 * 1000 + 5/100 * (x-1000)] = 20,000

                 By solving the above equation, we get x = 20894.74.


Comments

Post a Comment

Popular posts from this blog

Aptitude Day 59

Answers of Day 58:     1. 1/90.     2. 20 Problems to solve: 1. The product of two numbers is 33 and the sum of their squares is 130. Find their difference. 2. The sum of two numbers is 100 and their difference is 20. Find their product.
Post a Comment
Read more

Vocabulary Day 55

Dilemma Thesaurus: Noun : problem            double bind, difficulty, crisis, embarrassment, mess, puzzle...  Antonyms :  solution...  Example sentences:                  That's a serious dilemma we should think about that.          He'll never share his dilemma with anyone. 
Post a Comment
Read more

Aptitude Day 55

Problems On Numbers 1. The difference between the squares of two numbers is 28000 and the sum of their numbers is 400. Find the numbers. Solution:                 Let the 2 numbers be x and y.                 (x 2 -y 2 ) / (x+y) = 28000/400                 (x+y)(x-y) / (x+y) =  70                 x-y = 70 ------ Equation 1                 x+y = 400 ---- Equation 2                 By solving equations 1 and 2 we get,                 x = 235 and y = 165.                 The numbers are 235 and 165. 2. The sum of three consecutive numbers is 315. The middle number is: Solution:                 Let t...
Post a Comment
Read more