Skip to main content

Aptitude Day 39


Problems on Numbers

 1. A number is doubled and 5 is added. If the resultant is tripled, it becomes 33. What's the number?

Solution:
                 Let the number be x.
                 3(2x+5) = 33
                    6x+15 = 33
                           6x=18
                             x=3.
                 The number is 3.

 2. When 18 is subtracted from a number, it reduces to its three-fifth. What's the sum of the digits of that number?

 Solution:
               Let the number be x.
               x-18=3/5(x)
               x-3/5(x) = 18
               5x-3x = 90
                     2x = 90
                       x = 45.
              The sum of the digits of the number is 4+5 = 9. 
                 
Problem to solve

 Three-fifth of a number is 25 more than the half of the number. What's the number?


Comments

Post a Comment

Popular posts from this blog

Vocabulary Day 21

Stammer Thesaurus: Verb : stutter in speech, speak haltingly, speech defect           halt, hesitate, pause, stop, sputter... Antonyms : say quickly, pronounce, enunciate... Example sentences: ·          He was stammering when the teacher caught him red-handed. ·          One should avoid the stammering while delivering a speech. 
Post a Comment
Read more

Aptitude Day 47

Problem On Numbers 1. Three numbers are in the ratio 1:2:3 and their average is 180. What's the largest number? Solution:                 Let the numbers be x, 2x and 3x.                 x+2x+3x = 180                          6x = 180                            x = 30                The largest number is 3x = 90. Problem to solve: Three numbers are in the ratio of 4:2:3 and their product is 648. Find the smallest number. 
Post a Comment
Read more