Question
The following Venn diagram shows the number of students
who have visited three different cities (Delhi, Mumbai, Chennai). What is the number of students who have visited at least two of the places out of Delhi, Mumbai, and Chennai?Solution
‘At least two places’ means ‘two or more places’. So, three places should also be included to obtain the final answer. 
Therefore, the number of families who have visited at least two of the places = 24 + 18 + 7 + 6 = 55 Hence, the correct answer is (C).
The least number which when divided by 5, 10, 12 and 15 leave zero remainder in each case and when divided by 18 leaves a remainder of 6 is:
The LCM of two numbers is 216 and their HCF is 36. If one of the numbers is 72, the other number is:
The LCM of two numbers is 1991 and their HCF is 23. If one of the numbers is 181, the other number is
- Calculate the difference between the Least Common Multiple and the Highest Common Factor of 12, 30, and 45.
The smallest number which when divided by 27 and 36 leaves remainder 12 and 21 respectively is:
The HCF of two numbers is 13. Which of the following can never be their LCM?
What is the HCF of 36 and 198?
The product of two numbers is 4,320 and their highest common factor is 24. Find the least common multiple of these two numbers.
- The product of two numbers is 3888 and their L.C.M is 324. What is the H.C.F of the two numbers?
