Finding the Unit Digit of Powers of 3 (same approach)
First of all, divide the Power of 3 by 4. If you get any remainder, put it as the power of 3 and get the result using the below-given table. If you don’t get any remainder after dividing the power of 3 by 4, your answer will be (3)4 which always gives 1 as the remainder Easy Way to Find Unit Digit of Powers Let’s solve a few examples to make things clear. (1) Find the Units Digit in (3)33 Sol – Step-1: Divide the power of 3 by 4. It means, dividing 33 by 4. Step-2: You get the remainder 1. Step-3: Since you have got 1 as a remainder, put it as a power of 3 i.e (3)1. Step-4: Have a look at the table, (3)1=3. So, the answers will be 3 (2) Find the Unit Digit in (3)32 Sol – Step-1: Divide the power of 3 by 4. It means, dividing 32 by 4. Step-2: It’s completely divisible by 4. It means the remainder is 0. Step-3: Since you have got nothing as a remainder, put 4 as a power of 3 i.e (3)4. Step-4: Have a look at the table, (3)4=1. So, Answer will be 1 Finding the Unit Digit of Powers of 0,1,5,6 The unit digit of 0,1,5,6 always remains same i.e 0,1,5,6 respectively for every power. Finding the Unit Digit of Powers of 4 & 9 In the case of 4 & 9, if powers are Even, the result will be 6 & 4. However, when their powers are Odd, the result will be 1 & 9. The same is depicted below. If the Power of 4 is Even, the result will be 6 If the Power of 4 is Odd, the result will be 4 If the Power of 9 is Even, the result will be 1 If the Power of 9 is Odd, the result will be 9. For Example- (9)84 = 1 (9)21 = 9 (4)64 = 6 (4)63 = 4 Finding the Unit Digit of Powers of 7 (same approach) First of all, divide the Power of 7 by 4. If you get any remainder, put it as the power of 7 and get the result using the below-given table. If you don’t get any remainder after dividing the power of 7 by 4, your answer will be (7)4which always give 1 as the remainder Easy Way to Find Unit Digit of Powers Let’s solve a few examples to make things clear. (1) Find the Units Digit in (7)34 Sol – Step-1:Divide the power of 7 by 4. It means, dividing 34 by 4. Step-2:You get the remainder 2. Step-3:Since you have got 2 as a remainder, put it as a power of 7 i.e (7)2. Step-4:Have a look at the table, (7)2=9. So, Answer will be 9 (2) Find the Unit Digit in (7)84 Sol – Step-1:Divide the power of 7 by 4. It means, divides 84 by 4. Step-2:It’s completely divisible by 4. It means the remainder is 0. Step-3:Since you have got nothing as a remainder put 4 as a power of 7 i.e (7)4. Step-4:Have a look at the table, (7)4=1. So, Answer will be 1 Finding the Unit Digit of Powers of 8 (same approach) First of all, divide the Power of 8 by 4. If you get any remainder, put it as the power of 8 and get the result using the below-given table. If you don’t get any remainder after dividing the power of 8 by 4, your answer will be(8)4which always give 6 as the remainder Easy Way to Find Unit Digit of Powers Let’s solve a few examples to make things clear. (1) Find the Units Digit in (8)34 Sol – Step-1:Divide the power of 8 by 4. It means, dividing 34 by 4. Step-2: You get the remainder 2. Step-3: Since you have got 2 as a remainder, put it as a power of 8 i.e (8)2. Step-4: Have a look at the table, (8)2=4. So, answers will be 4 (2) Find the Unit Digit in (8)32 Sol- Step-1:Divide the power of 8 by 4. It means, dividing 32 by 4. Step-2:It’s completely divisible by 4. It means the remainder is 0. Step-3:Since you have got nothing as a remainder put 4 as a power of 8 i.e (8)4. Step-4:Have a look at the table, (8)4=1. So, answers will be 6
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