which of the following will have 1 at its unit place 19²,17²,18²,16²
Answers
Step-by-step explanation:
19*19=361
17*17=289
18*18=324
16*16=256
So, 19square will have 1 at its unit place
I hope it works for you
Concept
A square in mathematics is produced when a number is multiplied by itself. This operation is indicated by the word "to square." Squares are represented by a superscript 2 and are the same as numbers raised to the power 2, therefore the square of 3 would be written as 32, which is the number 9. A square in mathematics is produced when a number is multiplied by itself. This operation is indicated by the word "to square." Squares are represented by a superscript 2 and are the same as numbers raised to the power 2, therefore the square of 3 would be written as 32, which is the number 9.
Given
19² , 17² , 18² , 16²
Find
After squaring the aforementioned figures, we need to identify the number that has 1 in the units place.
Solution
We need to identify the value that will have 1 at the units position.
taking 19²
19² = 19×19 = 361
taking 17²
17² = 17×17 = 289
taking 18²
18² = 18×18 = 324
taking 16²
16² = 16×16 = 256
hence the number which has 1 in it's units place is 19²
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