Question
The average age of a group of persons going for tour to
Shimla is 22 years. 30 new persons with an average age of 8 years join the group and their average age becomes 12 years. The number of persons initially going for tour is?Solution
Initial number of persons = x 22x + (30 x 8) = 12(x + 30) 22x - 12x = 360 - 240 10x = 120 x = 12
The LCM of two numbers is 432 and their HCF is 55. If one of the numbers is 132, the other number is:
The product of two numbers is 504 and their HCF is 6. Total number of such pairs of numbers is?  Â
The sum of two numbers is 126 and their HCF is 14. Total number of such pairs of numbers is?  Â
Two positive integers multiply to 5070, with their highest common factor being 13 and their sum amounting to 143. What is the difference between these t...
The least number which when divided by 7, 12, 15 and 20 leave zero remainder in each case and when divided by 26 leaves a remainder of 4 is:
- Two numbers are in the ratio of 4:5, respectively. If their HCF is 18, then find their LCM.
The square of sum of two numbers is 9,801 and the sum of squares of the same two numbers is 5,265. If their H.C.F. is 9, then find their L.C.M.
If the product of two numbers is 96 and their HCF is 8, find the LCM of the given two numbers.
What will be the greatest common divisor (GCD) of (x² - 12x + 35) and (x² - 9x + 14).
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