Skip to main content

Aptitude Day 4



Answers of Day 3:  1.  360 * 17 = 360*(20-3)  = 7200 - 1080 = 6120
                                 2.  8756 * 99999 = 8756 * (100000-1) = 875591244
                                 3.  18888 * 999 = 18888 * (1000-1) = 18869112
                                 4.   5659 * 1000001 = 5659 * (1000000 + 1) =  5659005659

Unit Digit:

Example: Unit digit of the sum is 4938 + 8942 + 3937 + 4856 + 29393 = 6
           
Solution: 8+2=10, 0+7=7, 7+6=13, 3+3= 6. Add only the unit digit of the numbers, when it ends up in 2 digits again consider only the unit digit to add to the next number as shown above.


Problems to solve

Find the unit digit of the sum in the following

1. 25086+4271938+93728+3780967 = ?

2. 857064+889775+96369+687477 = ?

3. 527639+9992499+7488329+32516922 = ?

4. 739876+62259+669932+9759611 = ?

Answers are here Aptitude Day 5

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