Find the unit digit of the product 91 × 92 × 93........... 99.
Answers
91×92×93×94×95×96×97×98×99
= 628,156,509,555,294,720
Answer:
The unit digit of the product 91 × 92 × 93........... 99 is zero.
Step-by-step explanation:
Given,91 × 92 × 93........... 99.
We want to find unit digit of 91 × 92 × 93........... 99.
Here two digit is 92 and 95.
If we multiply 92 and 95, we will get zero as unit digit and if we multiply any digit by zero, unit digit always be zero.
So,unit digit of the product 91 × 92 × 93........... 99 is zero.
Unit digit related more information:
The unit digit of a number is the digit above one. i.e. it is the rightmost digit of the number. For example, unit number 243 is 3, unit number 39 is 9.
The concept of units number can be learned by knowing the units digits of all single digit numbers between 0 and 9 when raised to certain powers.
Numbers 0, 1, 5 and 6: If we observe the behavior of these numbers, they all have the same unit digit as the number itself when raised to any power, i.e. 0^n = 0, 1^n =1, 5^ n = 5, 6^n = 6.
Know more about unit digit,
https://brainly.in/question/500242
https://brainly.in/question/16772489
#SPJ3