Short Quiz

Question 1 of 5

A two-digit number has tens digit \(t\) and units digit \(t+4\). The digit sum is 12. What is the number?

A 84 B 57 C 48 D 39

Select one option. Answers are shown after the test.

Question 2 of 5

Solve \(x+8=21\).

A \(x=13\) B \(x=29\) C \(x=12\) D \(x=-13\)

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Question 3 of 5

Solve \(-4(x-2)=20\).

A \(x=7\) B \(x=-3\) C \(x=-7\) D \(x=3\)

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Question 4 of 5

The balanced scale shows \(3s+8\) on the left and \(2s+23\) on the right. What is one s-weight?

A 5 units B 15 units C 23 units D 31 units

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Question 5 of 5

An input is multiplied by 4 and then increased by 3. The output is 31. What is the input?

A 8.5 B 28 C 7 D 112

Select one option. Answers are shown after the test.

Class 6