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It is the unit's digit of the product of the unit's digits.

For example, the units digit of 123456 * 4689

is simply the units digit of 6*9 = 54, which is 4.

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Q: What is a unit's digit of the product?
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Continue Learning about Other Math

What is the units digit of the product when one hundred 7's are multiplied?

When multiplying numbers with the same units digit, the units digit of the product is determined by the units digit of the base number raised to the power of the number of times it is being multiplied. In this case, since 7 is being multiplied 100 times, the units digit of the product will be the same as the units digit of 7^100. The units digit of 7^100 can be found by looking for a pattern in the units digits of powers of 7: 7^1 = 7, 7^2 = 49, 7^3 = 343, 7^4 = 2401, and so on. The pattern repeats every 4 powers, so the units digit of 7^100 will be the same as 7^4, which is 1. Therefore, the units digit of the product when one hundred 7's are multiplied is 1.


How can you tell what the ones digit of the product of 38 multipled by7will be without solving the whole problem?

Find the units digit of 8*7. The 30 in 38 will have no effect on the units digit.


If The tens digit is twice the units digits and the units digit is the same as the tenths digit the hundredths digit is half the tenths digit?

84.42 or 42.21


What is the digit in the units place of a number is 5 if the no lies between 150 and 200 will be composite or prime?

For any integer greater than 5, where the units digit is 5 then that number can be expressed as the product of n and 5. As such, the number is composite. Therefore all numbers in the range 150 to 200 that have a units digit of 5 are composite,.


What is the units digit of 7 to the 15 power?

Power 2: units digit 9. Multiply by 49 again to get power 4: units digit 1. So every 4th power gives units digit 1. So 16th power has units digit 1, so the previous power, the 15th must have units digit 3.