What is the value of (42^2-764)?
Answer and explanation
Correct answer: 1000
First find the square of 42: 42² = 1764. Subtracting 764 from 1764 gives 1000. Therefore, the correct answer is 1000. An option such as 1100 may result from an error in subtraction at the hundreds place. Exam tip: In an expression with exponents, evaluate the exponent first and then perform addition or subtraction.
Frequently asked questions
What is the correct answer to this question?
1000
Why is this the correct answer?
First find the square of 42: 42² = 1764. Subtracting 764 from 1764 gives 1000. Therefore, the correct answer is 1000. An option such as 1100 may result from an error in subtraction at the hundreds place. Exam tip: In an expression with exponents, evaluate the exponent first and then perform addition or subtraction.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Number Systems. Topic: Exponents.
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