CBSE Guess > Papers > Important Questions > Class X > 2008 > Maths > Mathematics By :- Tanmaya

Mathematics

CHAPTER - 1

1. State Euclid division lemma.
2. Prove that {root 5} is an irrational number.
3. Prove that cube of any +ve integer is 9m, 9m+1 or 9m+8 where q is some integer

CHAPTER - 5

1. find the nth term of the A.P. 2, 5, 8……………, find its 54 Th term
2. What are an A.P. and a term?
3. Find the sum of first n odd natural numbers.
4. Find sum of first 22 terms of an A.P. in which d=22 and a22=149.
5. A man is employed to count Rs 10710.He counts @ Rs 180/minute for half an hour. After it he counts @Rs 3 less than the preceding minute. What time he had taken to count the entire money?

CHAPTER - 7{Theorems only}

1. Thale’s theorem.
2. If 2 triangles ABC and PQR are similar then prove that ratios of their areas are in ratio of squares of their corresponding sides.
3. Pythagoras theorem.