Start learning 50% faster. Sign in now
If a number is divisible by both 18 and 24, then it is divisible by L.C.M of 18 and 24 = 72 And, the required numbers will form an arithmetic progression So, First term (a) = 72 X 2 = 144 Common difference (d) = 72 Let required number of terms be 'n' We have, a + (n - 1)d = 720 (since 720 is the greatest multiple of 72 within the given range.) Or, 144 + 72(n - 1) = 720 Or, 144 + 72n - 72 = 720 Or, 72n = 648 So, n = (648/72) = 9 Hence, option b.
The edge length of a regular tetrahedron is 10 cm. What is its volume?
The ratio of the husband’s age three years from now to the wife’s age two years ago is 9:7. Additionally, the ratio of the husband’s age one year ...
Which of the following is a video format?
The ratio of present ages of 'X' and 'Y' is 4:9, respectively. The difference between the ages of 'X' and 'Y' is 25 years. If the present age of 'Z' is ...
Beena is twice as old as Sunita. Three years ago, she was three times as old as Sunita. How old is Sunita now?
The current age ratio of 'A' to 'B' is 5:7, and their combined age is 48 years. The age of 'A', after 'n' years, will equal the age of 'B' from 'n' year...
The present average age of ‘X’ and ‘Y’ is 45 years, present average age of ‘X’ and ‘Z’ is 32 years and present average age of ‘Y’ an...
B is 3 years older than A and A is 7 years older than C. If the sum of the age of A and C is 27 years, then find the sum of the ages of all three.
Twelve years ago, the average age of a family having four members (father, mother, son and daughter) is (y-2) years. The ratio between the present ages ...