Skip to main content

Aptitude Day 49


Problems on Numbers

 1. The sum of two numbers is 16. Three times of the first number will be five times of the second number. Find their product.

Solution:
               Let the 2 numbers are x and y.
               x+y = 16    ------ Equation 1
               3x = 5y   
               x = 5y/3
               Substitude x value in equation 1. We get,
               5y/3 + y = 16
               5y+3y = 16*3
                   8y = 16*3
                       y = 6.
               Then, x = 10.
               Their product is 6*10 = 60.

 2. The sum of two numbers is 33 and their difference is 3. Find their ratio.

Solution:
               Let the numbers be x and y.
               x+y = 33
               x-y = 3
               By solving these two equations we get,
               2x = 36
                x = 18.
                y = 15.
                Their ratio is 18:15 which is 6:5.

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