CBSE TEST PAPER-07

MATHEMATICS (Class-10)

Chapter 1. Real Numbers

1. What will be the value of 0.+ 0. ?

2. Given that HCF (135, 225) = 45. Find LCM (135, 225).

3. Solve √18x√50. What type of number is it, rational or irrational?

4. What type of decimal expansion will69/60 represent? After how many places will the decimal expansion terminate?

5. Find the H.C.F. of the smallest composite number and the smallest prime number.

6. If a = 4q + r then what are the conditions for a and q. What are the values that rcan take?

7. What is the smallest number by which √5 - √ 3 be multiplied to make it a rational no? Also find the no. so obtained.

8. What is the digit at unit’s place of 96?

9. Find one rational and one irrational no. between √3 and √5.

10. If the no. pn never to end with the digit 0 then what are the possible value (s) ofp?

11. State Euclid’s Division Lemma and hence find HCF of 16 and 28.

12. State fundamental theorem of Arithmetic and hence find the unique fraternization of 120.

13. Prove that 1/(2 - √5) is irrational number.

14. Check whether 5 × 7 × 11 + 6 is a composite number.

15. Check whether 7 × 6 × 3 × 5 + 5 is a composite number.

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