The average of the first and the second of three numbers is 15 more than the average of the second and the third of these numbers . what is the difference between the first and the third of these three numbers?

30 pens and 75 pencils altogether were purchased for Tk. 510. If the speed of the stream is 3 km / hr then fin...

The ratio of the speed of boat in still water to the speed of stream is 16: 5. A boat goes 16.5 km in 45 minut...

A train passes a platform in 40 sec and a woman standing on the train is 108 km /hr. what is the length of the...

There are two numbers, 1st number is 12 more than the 2nd number. The average of the two numbers is 19. If 2 i...

Sum of 4 consecutive even numbers is greater than three consecutive odd numbers by 81 . If the sum of the leas...

A Number is as much greater than 36 as is less than 86 . Find the Numbers.