Sum of ages of A, B and C = 28 × 3 = 84 years Sum of ages of B, A and D = 26 × 3 = 78 years So, C – D = 84 – 78 = 6 years Let the age of C and D be 5x and 3x years, respectively. 5x – 3x = 6 2x = 6 x = 3 So, age of D = 3x = 9 years.
The sum of the digits of a two-digit number is 9, and when the digits are reversed, the number decreases by 45. Find the changed number.
A person distributes pens among his three friends A, B and C in the ratio 1/5 : 1/6: 1/8 . What is the minimum number of pens that the persons should have?
What is the average of all the prime numbers which are less than 35?
Consider the following statement
1.There is a finite number of rational numbers between any two rational numbers.
2. There is an infin...
Find the third proportion of 22 and 11.
When a number is divided by 114, remainder is 82. What will be the remainder when the cube of the number is divided by 19?
Consider three numbers whose total is 294. The first and second numbers are in a ratio of 5:7, and the second and third numbers are in a ratio of 7:9. D...
The ratio of two natural numbers 'u' and 'v' is 3:4, respectively. When 12 is added to 'u' and 8 is subtracted from 'v', the ratio of 'u' to 'v' becomes...
Find the number of zeroes in the end of 160!
