Question
The average age of three children is 20 years. If their
ages are in the ratio 3:5:7. Find the age of the youngest child.Solution
Total age of three children = 20 × 3 = 60 years Let their ages be 3x, 5x and 7x respectively. => 3x + 5x + 7x = 60 => 15x = 60 => x = 4 Therefore the age of youngest child = 4 × 3 = 12 years
Find the LCM of the following fractions:
4/13, 5/7 and 7/5Â
- The sum of HCF and LCM of two numbers is 765. The LCM is 84 times the HCF. If one of the numbers is 85, what is the other number? (find approximate value)
LCM of two numbers is 8 times their HCF. The product of the numbers is 10240. What will be the maximum possible difference between the numbers?
Ratio of two numbers 6:13 and their LCM is 1950. Find the sum of the given two numbers.
If total number of factors of 1,080 is 'x', then find the value of (x - 4)(x + 3).
Three numbers are in the ratio 6:9:10 respectively. If the HCF of the numbers is 3, then find the LCM of the numbers.
Find out the sum of digits of largest number that leaves same remainder when it divides 12006, 6006, 5506 and 10006.Â
If the sum of 2 numbers is 185, their LCM is 1700 and HCF is 5. Then the difference between 2 numbers is:
A launches a partnership with Rs. (P + 700). B joins after 5 months with Rs. 2P. If the ratio of B’s profit share to A’s is 7:8, find (P − 100).
Find the HCF of 36, 108, and 156.
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