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Question 1 of 310

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30

Which number is different? 14, 21, 34, 42

A 14 B 21 C 34 D 42

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Question 2 of 310

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30

Which process gradually wears away rocks and soil?

A Condensation B Erosion C Reflection D Refraction

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Question 3 of 310

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30

Which mineral is essential for healthy bones and teeth?

A Iron B Calcium C Zinc D Potassium

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Question 4 of 310

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30

Which planet is famous for its blue color because of methane in its atmosphere?

A Mars B Neptune C Mercury D Venus

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Question 5 of 310

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What does Wi-Fi officially stand for?

A Wireless Fidelity B Wireless Fiber C Nothing—it is a brand name, not an acronym D Wide Frequency

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Question 6 of 310

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Which planet has the strongest magnetic field in our Solar System?

A Earth B Saturn C Jupiter D Neptune

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Question 7 of 310

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30

When you start running, which body function usually increases first?

A Hair growth B Heart rate C Bone length D Finger size

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Question 8 of 310

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30

Without using a calculator, which number is closest to 49 × 21?

A 900 B 1,000 C 1,200 D 1,500

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