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
\(\frac{7}{19}\times \frac{100}{1}\% = 36.8\%\)
20o
30o
50o
65o
Correct answer is B
No explanation has been provided for this answer.
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