Mathematics
Grade-8
Easy
Question
Which of the following is the difference between the squares of 21 and 22?
- 21
- 22
- 42
- 43
Hint:
To find the solution for (22)2 - (21)2, we will simplify the expression and then solve for the final answer.
The correct answer is: 43
GIVEN-
Given numbers- 21 & 22
TO FIND-
Difference between the squares of the given numbers.
SOLUTION-
(22)2 - (21)2
= 484 - 441
= 43
FINAL ANSWER-
Option 'a' i.e. '43' is the correct answer to the given question.
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Mathematics
Guess the irrational numbers that lies between ![4 space and space square root of 21](data:image/png;base64,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)
Guess the irrational numbers that lies between ![4 space and space square root of 21](data:image/png;base64,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)
MathematicsGrade-8