The average of 7 numbers is 28. The average of first three of them is 23 and the last three of them is 42. Then the fourth number is:
We know that, Average = Sum of all quantities/number of quantities Average of 7 numbers = 28 ∴ Sum of all numbers = 28 × 7 = 196 Average of first 3 numbers is 23. Sum of first 3 numbers = 3 × 23 = 69 Average of last 3 numbers os 42. Sum of last 3 numbers = 3 × 42 = 126 4th number = 196 – 69 – 126 = 1
The least multiple of 19, which on dividing by 5,6,7,8 and 9 leaves remainder 2 in each case is
The product of two numbers is 504 and their HCF is 6. Total number of such pairs of numbers is?
The HCF of two numbers is 12. Which one of the following can never be their LCM?
Find the LCM of 25/14, 15/28, 30/21
The sum of two numbers is 65 and their HCF is 13. Total number of such pairs of numbers is?
The HCF of a^6 - 1 and a^4+ 2a^3- 2a-1 is
The HCF and LCM of two consecutive even number is 2 and 112 respectively. Find the sum of reciprocal of these two numbers?
