1003034101
Level:
A
Evaluating the expression \( \frac12 + \frac23 \) we get:
\( \frac76 \)
\( \frac35 \)
\( \frac7{12} \)
\( \frac36 \)
Elementary arithmetics
1003034102
Level:
A
Evaluating the expression \( \frac27 \cdot 3 \) we get:
\( \frac67 \)
\( \frac57 \)
\( \frac6{21} \)
\( \frac2{21} \)
1003034103
Level:
A
The result of subtraction \( 0.36-3.21 \) is:
\( -2.85 \)
\( 2.85 \)
\( 3.57 \)
\( 3.15 \)
1003034105
Level:
A
Evaluate the expression \( 0.864:0.24 \).
\( 3.6 \)
\( 36 \)
\( 0.36 \)
\( 0.624 \)
1003034109
Level:
A
Give the result of \( 3+5-2\cdot3+\left(2^3-6\right):1\).
\( 4 \)
\( 20 \)
\( 14 \)
\( 2 \)
1003034110
Level:
A
Calculating \(2\cdot3-(4\cdot15-36)\) we get:
\( -18 \)
\( 18 \)
\( 90 \)
\( -90 \)
1003099201
Level:
A
A toe sometimes appears as a unit of energy in various publications. One toe is a unit of energy defined as the amount of energy released by burning one tonne of crude oil and it equals \( 41 868\,\mathrm{MJ} \) (\( 1 \,\mathrm{MJ} = 1\, 000\, 000 \,\mathrm{J} \)). How many joules are in \( 1 \) toe?
\( 4.1868\cdot10^{10} \)
\( 4.1868\cdot10^{8} \)
\( 4.1868\cdot10^{9} \)
\( 4.1868\cdot10^{11} \)
1003099202
Level:
A
The average distance from Mars to the Sun is \( 2.28\cdot10^8\,\mathrm{km} \). Give the distance in the standard form.
\( 228\,000\,000\,\mathrm{km} \)
\( 22\,800\,000\,\mathrm{km} \)
\( 2\,280\,000\,000\,\mathrm{km} \)
\( 22\,800\,000\,000\,\mathrm{km} \)
1003099203
Level:
A
A man sleeps \( 8 \) hours a day on average. How many seconds on average does he sleep during the longest month of the year? Give the result in exponential notation.
\( 8.928\cdot10^5\,\mathrm{s} \)
\( 1.488\cdot10^4\,\mathrm{s} \)
\( 8928\cdot10^2\,\mathrm{s} \)
\( 8.64\cdot10^5\,\mathrm{s} \)
1003099204
Level:
A
Consider the information given in the table. Calculate the shortest distance between Neptune (the farthest planet from the Sun) and Mercury (the closest planet to the Sun).
\[
\begin{array}{|c|c|} \hline \text{Planet} & \text{Distance from the Sun } (\mathrm{km} ) \\\hline \text{Mercury} & 5.8\cdot10^7 \\\hline \text{Neptune} & 4.5\cdot10^9 \\\hline \end{array}
\]
\( 4.442\cdot10^9\,\mathrm{km} \)
\( 4.558\cdot10^9\,\mathrm{km} \)
\( 1.3\cdot10^7\,\mathrm{km} \)
\( 1.3\cdot10^9\,\mathrm{km} \)