\(\frac{1}{3}\)
\(\frac{1}{2}\)
\(1\frac{1}{6}\)
\(1\frac{1}{2}\)
Correct answer is D
\(2\frac{1}{6} + 2\frac{7}{12}\)
= \(\frac{13}{6} + \frac{31}{12}\)
= \(\frac{26 + 31}{12}\)
= \(\frac{57}{12} = \frac{19}{4}\)
\(\frac{19}{4} - 3\frac{1}{4}\)
= \(\frac{19}{4} - \frac{13}{4}\)
= \(\frac{6}{4}\)
= \(1\frac{1}{2}\)
3453
5556
6016
13453
Correct answer is A
4321\(_7\) + 1234\(_7\) = 5555\(_7\)
Missing number = 12341\(_7\) - 5555\(_7\)
= 3453\(_7\)
Simplify \(\frac{10}{\sqrt{32}}\)
\(\frac{5}{4}\sqrt{2}\)
\(\frac{4}{5}\sqrt{2}\)
\(\frac{5}{16}\sqrt{2}\)
\(\frac{16}{5}\sqrt{2}\)
Correct answer is A
\(\frac{10}{\sqrt{32}}=\frac{10}{\sqrt{16\times 2}} = \frac{10}{4\sqrt{2}}\\
\frac{10\times \sqrt{2}}{4\sqrt{2}\times\sqrt{2}}=\frac{10\sqrt{2}}{4\times 2}= \frac{5}{4}\sqrt{2}\)
Express 398753 correct to three significant figures
398000
398700
398800
399000
Correct answer is D
398753 \(\approxeq\) 399000 (to 3 s.f)
Express \(\frac{7}{19}\) as a percentage, correct to one decimal place
2.7%
3.7%
27.1%
36.8%
Correct answer is D
\(\frac{7}{19}\) as a percentage will be
\(\frac{7}{19}\times \frac{100}{1}\% = 36.8\%\)