What is the unit digit in the product (365 x 659 x 771) ?
Explanation:
Unit digit in 34 = 1 Unit digit in (34)16 = 1
Unit digit in 365 = Unit digit in [ (34)16 x 3 ] = (1 x 3) = 3
Unit digit in 659 = 6
Unit digit in 74 Unit digit in (74)17 is 1.
Unit digit in 771 = Unit digit in [(74)17 x 73] = (1 x 3) = 3
Required digit = Unit digit in (3 x 6 x 3) = 4.
What is the unit digit in 7105 ?
Explanation:
Unit digit in 7105 = Unit digit in [ (74)26 x 7 ]
But, unit digit in (74)26 = 1
Unit digit in 7105 = (1 x 7) = 7
The unit digit in the product (784 x 618 x 917 x 463) is:
Unit digit in the given product = Unit digit in (4 x 8 x 7 x 3) = (672) = 2
The unit digit of the sum 1289 + 2541 + 8215 + 6137 is:
Solution: The required answer is the unit digit of the sum of the unit digits of the numbers in given sum. i.e., The unit digit of (1289 + 2541 + 8215 + 6137) = the unit digit of (9+1+5+7) = the unit digit of (22) = 2 Hence the answer is 2.
The unit digit of the product 1022 x 729 x 889 x 971 is:
a)2
Solution:
The required answer is the unit digit of the product of the unit digits of the numbers in given product.
i.e, The unit digit of (1022 x 729 x 889 x 971)
= the unit digit of (2 x 9 x 9 x 1)
= the unit digit of (162)
= 2
Hence, the answer is 2.
Video | 23:43 min
Doc | 4 Pages
Video | 20:55 min
Test | 5 questions | 10 min
Test | 10 questions | 20 min
Test | 15 questions | 20 min
Test | 5 questions | 10 min
Test | 30 questions | 60 min