Q3. If p and q are two prime numbers, what is their H.C.F?
Q4. If a = p q² and b = p³ q, p, q being prime numbers, then L.C.M. (a, b) is
Q5. The highest common factor of 21 and 90 is:
Q6. The HCF of smallest prime number and the smallest composite number is:
Q6. If H.C.F. (26, 169) = 13, then L.C.M. (26, 169) is:
Q8. If HCF (x, 8) = 4, LCM (x, 8) = 24, then x is:
Q9. The sum of the HCF and LCM of 12, 21, 15 is:
Q10. If the LCM of two numbers is 3600, then which of the following numbers cannot be their HCF?
Q11. The LCM of the smallest two-digit composite number and the smallest composite number is:
Q12. The smallest number which when divided by 17, 23 and 29 leaves a remainder 11 in each case is:
Q13. If a = 2^2 × 3^7 × b and b = 2^2 × 3 × 5 × c and LCM(a, b, c) = 3780, then x is:
Q14. Given that HCF (2520, 6600) = 40 and LCM (2520, 6600) = 252k, then the value of k is:
Q15. The smallest number divisible by all natural numbers between 1 and 10 (both inclusive) is:
Q16. If the HCF of 408 and 1032 is expressible in the form 102a + 408 × 5, then the value of m is:
Q17. Two tanks contain 504 and 735 litres of milk respectively. Find the maximum capacity of a container which can measure the milk of either tank an exact number of times.
Q18. There are 56 students in section A and 58 students in section B of a class. Find the minimum number of books required so that they can be distributed equally among students of section A or section B.
Q19. There are 312, 260 and 156 students in class X, XI and XII respectively. Buses are to be hired so that each bus has equal number of students. The maximum number of students who can sit in a bus is: