What is the highest common factor of \(30\) and \(42\)
\(6\)
Evaluate, without using a calculator, \([5 - ( - 9)] \times 3 - 10\)
\(32\)
Evaluate, without using a calculator, \(\dfrac{{37 - 4 \times 9}}{{(84 - 78) \div 2}}\)
\(\dfrac{1}{3}\)
Does \(\sqrt{25+16}=\sqrt{25}+\sqrt{16}\)? Justify your answer
No, they are not equal
Are \(\sqrt {81 \times 4} \) and \(\sqrt {81} \times \sqrt 4 \) equal
Yes
Evaluate \(\sqrt[3]{{512}}\) without using a calculator
\(8\)
\( - 10 + 25 \div 5 \times 4 + 7 = \)
\(17\)
\(9 + 7 \times 4 - 3 \times 9 = \)
\(10\)
Calculate \(\sqrt[3]{{7 \times 7 \times 7 \times 2 \times 2 \times 2}}\)
\(14\)
What is the greatest common divisor of \({\rm{66}}\) and \({\rm{84}}\)?
