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CBSE Notes 2011-2012

this a test paper of ch 1 maths x from text book get it cheked by submitting your answer sheet at dii.kiranpatel@yahoo.com

STD-X D.P.S DII INSTITUTE MARKS :- 20
SUB –MATHS CH-1(T.B) ABOVE AXIS BANK, BOPAL STD-1-12SCI/COM_ SAT TEST
Q1. Find HCF of 196 and 38220 using Euclid’s algorithm.
Q2. Use Euclid’s division lemma to show that the cube of any positive integer is of the form 9m,9m+1 or 9m+8.
Q3. Given that HCF (306,657) =9, find LCM (306,657).
Q4. Explain why 7*11*13+13 and 7*6*5*4*3*2*1+5 are composite numbers.
Q5. Prove the following as irrational ?7 and 4 + ?7
Q6. Express as prime factors 23.3408
Q7. Prove that ? 2 is irrational.
Q8. A sweetsellar has 420 kaju barfis and 130 badam barfis .she wants to stack them in such a way that each stack has the same number, and they take up the least area of the tray. What is the maximum number of barfis that can be placed in each stack for this purpose?
Q9. Show that any positive integer is in the form of 4q+1 or 4q+3 where q is some integer.
Q10. Consider the number 4 raise to n, where n is natural number. Check whether there is any value of n for which 4 raise to n ends with the digit zero