FORMATIVE ASSESSMENT -1

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MARKS CLASS : X (EM) SUBJECT : Mathematics GRADE Marks : 20 Time : 1 hour Name of the Student : …………………………………………… Roll No : …………………………………. Topics: 1.Real Numbers 2.Statistics I. ANSWER ALL THE QUESTIONS 3X1=3 M 1. Find the HCF of 900 and 250 by using Euclid’s division Algorithm? 2. If the median of

𝑥 𝑥 𝑥 𝑥

, , , , 𝑥 𝑖𝑠 6. Then find the value of x.

3 2 6 4

3. Write the decimal expansion of

21 25

without actual division.

II. ANSWER ALL QUESTIONS 3X2=6M 4. Write the formula for finding the median of grouped data and explain the terms in it. 5. Find the value of log 2 64 + log 2 32 − log 2 16 6. How will you show that (17x11x2)+(17x11x5) is a composite number?explain. III.ANSWER ALL THE QUESTIONS 2X4=8 M 7. Prove that √5 is irrational number. 8. Find the mean of the following data by step-deviation method. Class interval 5-15 15-25 25-35 35-45 45-55 55-65 Frequency 6 11 21 23 14 5 IV.CHOOSE THE CORRECT ANSWER

1

6x =3 M 2

9. Which of the following is not an irrational number [ ] A) √5+√3 B)√9+√6 C)√8+√25 D)√16+√36 10. The least number that is divisible by all the numbers from 1 to 10 A)10 B)100 C)504 D)2520 [ ] 1

11. If log x 4= 4, then x is equal to [ ] A)256 B)64 C)16 D)128 12. The mean of first five prime numbers [ ] A)5.6 B)5.4 C)5 D)3.6 13. Which of the following is not a measure of central tendency A) mean B) Range C)median D)mode [ ] 14. Find the mode of 7,8,6,7,8,6,5,8,9,5 [ ] A)8 B)7 C)6 D)5

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