Skip to main content

Aptitude Day 56


Problems on Numbers:

 1. The product of 3 even consecutive numbers when divided by 5 is 335. The product of their square roots is:

Solution:
               Let the numbers be x, x+2 and x+4.
               x(x+2)(x+4) / 5 = 335
               x(x+2)(x+4) = 1675
               [ x(x+2)(x+4) ]1/2 = 5(67)1/2  

2. The sum of the three consecutive multiples of 5 is 375. What's the middle number?

 Solution:
                Let the 3 numbers be 5x, 5(x+1), 5(x+2).
                5x+5(x+1)+5(x+2) = 375
                5x+5x+5+5x+10 = 375
                15x+15 = 375
                 15x = 360
                     x= 24.
                The middle number is 5(x+1) = 5(25) = 125.

Comments

Post a Comment

Popular posts from this blog

Aptitude Day 16

Answers of Day 1 :   1. 10609                                    2. 99900025                                    3. 9409                                    4. 1010025                                      Problems On Ages              Today, in this topic, we're gonna see only the 3 models. Let's check it out. Problems: 1. John's age after 15 years will be 5 times his age 5 years back. What's the present age of John?   Solution: Let John's current age be x.                            ...
Post a Comment
Read more

Aptitude Day 10

      Answers of Day 9:       1. 6                                      2. 5                                      3. 0                                      4. 0                                      5. 6 The Cycle of Unit Digit:    Today we're gonna look at the cycle of unit digit  7.       7 1  =  7      7 2  = 4 9      7 3  = 34 3      7 4  = 240 1      7 5  = 1680 7      7 6  = 11764 9   ...
Post a Comment
Read more