1275.Find the median of: 1, 2, 3, 4, 5, 6, 2, 1, 7?
1276.Food for 28 students lasts 20 days. After 8 days, 4 students leave. For how many more days will the remaining food last?
1277.Find the area of a rectangle whose length is 4 and width is 3?
1278.Two school bells ring together at 8:00 AM. One rings every 32 minutes and the other every 40 minutes. When will they ring together again?
1279.Which Muslim scientist wrote the first book on Algebra and is known as the Father of Algebra?
1280.A ladder makes an angle of 45 degree with the ground when placed against a wall. If the foot of the ladder is 5m away from the wall, then the height of wall is?