Mix Questions - Worksheet 1

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Chapter 5 Class 6 Ganita Prakash - Mix Questions Worksheet 1 by teachoo Chapter: Chapter 5 Class 6 - Prime Time (Ganita Prakash) Name: _____________________________ School: _____________________________ Roll Number: _____________________________ Find the smallest number that is a multiple of all the numbers from 1 to 15 Which of the following is the product of exactly two distinct prime numbers :- 32 , 77, 25 , 65 , 96? Write two three digit numbers whose product is 51570. The two numbers should not have 0 as the units digit. Find the prime factorization of 58 × 30 without multiplying first. Is the first number divisible by the second? (a) 1215 and 81 (b)468 and 27 The teacher asked if 39200 is divisible by all of 2, 4, 5, 7,8 and 10. Guna checked for divisibility of 39200 by only three of these numbers and then declared that it was also divisible by all of them. What could those three numbers be? Fill in the blanks :- (1) Co -prime numbers have no common factor other than _______. (2) The smallest common multiple ( other than 1 ) of 4 and 6 is __. (3) If a number has 2 , 3 and 11 as prime factors, the smallest such number is _______. (4) In the divisibility test of _, only the last three digits matter when deciding if a given number is divisible by it or not. (5) The smallest number whose prime factorisation has two different prime numbers ____. The first number has prime factorisation 2 × 5 × 19 and the second number has prime factorisation 5 × 7 × 19. Are they co-prime? Does one of them divide the other? State True / False :- (1) Every Even number greater than 2 is composite. (2) Only odd numbers are prime. (3) 1 is a factor of every number. (4) A number divisible by 4 is always even. (5) 5 is the smallest odd prime number. Find the remainders obtained when each of the following numbers are divided by 2, 3 and 5. (1)92 (2) 67 (3) 222 (4) 400 (5)625 (6)5252 (7) 929 Important links Answer of this worksheet - https://www.teachoo.com/25630/5381/Mix-Questions---Worksheet-1/category/Teachoo-Questions---Mix/ Full Chapter with Explanation, Activity, Worksheets and more – https://www.teachoo.com/subjects/cbse-maths/class-6/chapter-5-ganit-prakash/ Science Class 6 – https://www.teachoo.com/subjects/science/class-6/ Maths Class 6 - https://www.teachoo.com/subjects/cbse-maths/class-6/ For more worksheets, ad-free videos and Sample Papers – subscribe to Teachoo Black here - https://www.teachoo.com/black/   Answer Key to Mix Questions Worksheet 1 1. 360360 2. 77 , 65 3. 382 and 135 4. 2^2 × 3 × 5 × 29. 5. (a) Yes , first number is divisible by the second. (b) No , first number is not divisible by the second. 6. Those three numbers are 7 , 8 and 10. 7. (1) 1 (2) 2 (3) 66 (4) 8 (5) 6 8. No , They are not co- prime. Also , one of them does not divide the other. 9. (1) True (2) False (3) True (4) True (5) False 10. Remainders when divided by 2 – (1) 0 (2) 1 (3) 0 (4) 0 (5) 1 (6) 0 (7) 1 Remainders when divided by 3 – (1) 2 (2) 1 (3) 0 (4) 1 (5) 1 (6) 2 (7) 2 Remainders when divided by 5 – (1) 2 (2) 2 (3) 2 (4) 0 (5) 0 (6) 2 (7) 4