Number Systems 7.1.6 S

© 2009 -2011 tutorco.com 1 Q1. Calculate (32 + 3)2 Q2. Calculate 30 – (10 – 6)2 Q3. Calculate 3 × (4 + 52) Q4. Calculate 24 × (10 – 7) GRADE 7 TOPIC: NUMBER SYSTEM 7/1/6/S © 2009 -2011 tutorco.com 2 Q5. Calculate (14 –10)2 × 6 Q6. Say whether the number 6 is prime or composite. Q7. Say whether the number 19 is prime or composite Q8. Find the GCF of 90 and 126? Q9. Find the GCF of 20 and 15? © 2009 -2011 tutorco.com 3 Q10. Find the GCF of 75 and 30? Q11. Find the GCF of 45 and 72? Q12. Find the GCF of 75 and 50? Q13. Find the LCM of 15 and 8? © 2009 -2011 tutorco.com 4 Q14. Find the LCM of 25 and 15? Q15. Find the LCM of 30 and 15? Q16. Find the LCM of 12 and 36? Q17. Find the LCM of 19 and 57? © 2009 -2011 tutorco.com 5 Q18. Say whether the number 27 is prime or composite? Give reason for your answer. Q19. Find the prime factorization of 76? Q20. Find the prime factorization of 504? Q21. Compare: 1109 _______ 1190 Q22. Compare: 575 _______ 757 © 2009 -2011 tutorco.com 6 Q23. What is the place value of 5 in 562,418? Q24. Write in standard form: 500,000 + 20,000 + 9,000 + 800 + 90 + 9? Q25. Write 762,489 in expanded form?