Which number should replace the question mark in \((4.25+2.75)^2+?=5^3-(9\times8)\)?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 4
Work out each side separately, brackets and powers first, then find the number that makes the two sides equal.
Left side: \((4.25+2.75)^2=7^2=49\), so the left side is \(49+?\)
Right side: \(5^3-(9\times8)=125-72=53\)
\(49+?=53\), so \(?=4\)