Real Numbers

Real Numbers

9th - 10th Grade

8 Qs

quiz-placeholder

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Real Numbers

Real Numbers

Assessment

Quiz

Mathematics

9th - 10th Grade

Practice Problem

Hard

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8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Given that p is a non-negative integer, which of these gives positive integers that are multiple of 5?

10p and 10p+2

10p and 10p+3

10p and 10p+4

10p and 10p+5

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Rahul has 40 cm long red and 84 cm long blue ribbon. He cuts each ribbon into pieces such that all

pieces are of equal length. What is the length of each piece?

4 cm as it is the LCM of 40 and 84

4 cm as it is the HCF of 40 and 84

8 cm as it is the LCM of 40 and 84

8 cm as it is the HCF of 40 and 84

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Three bulbs red, green and yellow flash at intervals of 80 seconds, 90 seconds and 110 seconds. All

three flash together at 8:00 am. At what time will the three bulbs flash altogether again?

9:00 am

9:12 am

10:00 am

10:12 am

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following is an irrational number?

28\frac{\sqrt{2}}{\sqrt{8}}

335\frac{\sqrt{3}}{3\sqrt{5}}

520\frac{\sqrt{5}}{\sqrt{20}}

637\frac{\sqrt{63}}{\sqrt{7}}

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following is NOT an irrational number?

 2 × 122\ \times\ \frac{1}{\sqrt{2}}  

 2×12\sqrt{2}\times\frac{1}{2}  

 2×13\sqrt{2}\times\frac{1}{\sqrt{3}}  

 2×12\sqrt{2}\times\frac{1}{\sqrt{2}}  

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Is 9 - √2 an irrational number?

No, because if 9 - √2 = a/b , where a and b are integers and b ≠ 0, then √2 = (9b - a ) / b ,but √2 is an irrational number. So, 9 - √2 ≠ a/b.

No, because if 9 - √2 = a/b , where a and b are integers and b ≠ 0, then √2 = (9b + a ) / b ,but √2 is an irrational number. So, 9 - √2 ≠ a/b.

Yes, because if 9 - √2 = a/b , where a and b are integers and b ≠ 0, then √2 = (9b - a ) / b ,but √2 is an irrational number. So, 9 - √2 ≠ a/b.

Yes, because if 9 - √2 = a/b , where a and b are integers and b ≠ 0, then √2 = (9b + a ) / b ,but √2 is an irrational number. So, 9 - √2 ≠ a/b.

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following is equivalent to a decimal that terminates?


152 × 22\frac{1}{5^2\ \times\ 2^2}

122 × 3\frac{1}{2^2\ \times\ 3}

152 × 7\frac{1}{5^2\ \times\ 7}

152 × 112\frac{1}{5^2\ \times\ 11^2}

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