Aptitude Day 8

Answers of Day 7:     1. 7

                                    2. 9

                                    3. 7

                                    4. 1

Rules for the number 4

  

There is no cycle for 4.

If you get the power as an odd number, the answer will be 4. If it’s an even number, the answer is 6.

Example: Unit digit of the product of   4³¹ * 4⁴⁰ =?

Solution:  31 is an odd number so 4 and 40 is an even number so 6. Therefore 4*6=24. The unit digit is 4.

Problems to solve

1.    4⁶⁹*4⁷¹ *4⁸² *4⁸⁴ =?

2.    4¹³ * 4¹⁷*4²⁸ =? 

3.    4²⁰ *4¹¹ * 4¹³ * 4⁴⁹ =?

4.    4³ *4⁷ * 4²¹ * 4⁷⁶ =?

Check out the answers over here Aptitude Day 9