Question
The average of 15 numbers is 110. The average of the
first 7 numbers is 98 and the average of the last 7 numbers is 62. What is the 8th number?Solution
Total sum of 15 numbers = 15 × 110 = 1650 Sum of first 7 numbers = 7 × 98 = 686 Sum of last 7 numbers = 7 × 62 = 434 According to question, => 1650 – (686 + 434) = 530
The given numbers are in the ratio 2:5:6, and their highest common factor (HCF) is 15. Determine the least common multiple (LCM) of these numbers.
Find the least common multiple of (28/42), (35/49), and (14/21).
HCF of two numbers 60 and 100 can be expressed in the form of (25m – 80) whereas LCM of these two numbers can be expressed in the form of (40n – 20)...
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.
Find the difference between sum of digits of LCM and HCF of 24, 36 and 90.
- Three numbers are in the ratio 7:2:3 respectively. If the HCF of the numbers is 6, then find the LCM of the numbers.
What will be the greatest common divisor (GCD) of (x² - 12x + 35) and (x² - 9x + 14).
The maximum number of students among whom 891 pens and 810 pencils can be distributed in such a way that each student gets same number of pens and same ...
The sum of two numbers is 65 and their HCF is 13. Total number of such pairs of numbers is?  Â
Three numbers are in the ratio 4 : 9 : 13 and their LCM is 2340. Their HCF is:
