If (a+a+a)=(b+b+b+b)and (a+b)=7, then what is the value of (a2-b2)?

Baki lives 2 miles west of Raju's house. Rafiq lives 3 miles north of Raju's house and 2 miles west Diba's hou...

On Tuesday, 30 of the students in a class took a test and their average score was 83.5. On Thursday, the other...

If the average of 7, 13, p and q is 17, what is the average of (p+11) and (q-9)?

Reza's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 is to 2 and...

After being dropped, a certain ball always bounces back to 2/5 of the height of its previous bounce. After the...

At a particular moment, if the angle between the hour hand and the minute hand of a clock is 105 , what was th...