My friend collects antique stamps. She purchased two, but found that she needed to raise money urgently. So she sold them for Rs. 8000 each. On one she made 20% and on the other she lost 20%. How much did she gain or lose in the entire transaction?

How many numbers are there in all from 4000 to 4999 (both 4000 and 4999 included. having at least one of their digits repeated?

 If Lance Armstrong cycles at 10km/hr, then he arrives at certain destination at 1 pm. If he cycles at 15km/hr, he will arrive at same place at 11 A.m. At what speed must he cycle to get there by noon?

Find the sum of the first 50 common terms of 12,16,20,… and 18,24,30,….

If 1/2x +1/4x+1/8x=14 Then the value of x is:

Six bells commence tolling together and toll at intervals 2,4,6,8,10 and 12 seconds respectively. In 30 minutes how many times they toll together.

The time showed by an analog clock at a moment is 11 am then 1234567890 hours later it will show the time as:

A trapezium with an area of 5100 cm2 has the perpendicular distance between the two parallel sides of 60m . if one of the parallel sides be 40m. find the length of the other side.

 There are 5 doors to a lecture room. In how many ways can a student enter the room through a door and leave the room by a different door?

Find the simple interest on Rs. 306.25 from March 3rd to July 27th( In the same year ) at 3.75 percent.

Square of two more than a two digit number is multiplied and divided by 2 and 5 respectively. If twice of the result is equal to 500 then find the number?