The unit place digit in 2^50 x 5^48 – 9 is tennetiraj please help for my questions​

2 thoughts on “The unit place digit in 2^50 x 5^48 – 9 is tennetiraj please help for my questions​”

1. Step-by-step explanation:

   Given :–

   2^50 x 5^48 – 9

   To find :–

   The unit place digit in 2^50 x 5^48 – 9 ?

   Solution :–

   Given number is 2^50 x 5^48 – 9

   2^50 = 2×2×2×…×(50 times)

   2^1 = 2

   2^2 = 4

   2^3 = 8

   2^4 = 16

   2^5 = 32

   2^6 = 64…

   If you continues the unit places are 2,4,8,6.They repeat agin again

   2^50 = (2^5)^10

   The units place of 2^50 = 4

   and 5^48

   5^1 = 5

   5^2 = 25

   We continue like this we get always 5 in its units place

   => The unit digit in 5^48 is 5

   Now

   The unit place of 2^50×5^48 is

   => 4×5

   => 20

   Unit place is 0

   and given that

   The unit place of 2^50 x 5^48 – 9

   We have 0 as units place of the product and

   9 is subtracted from the product

   So The required digit must be 10-9 = 1

   Answer:–

   The unit place for the given problem is 1

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2. Answer:

   hello good evening friend

   Reply