Science
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Cell Structure and Functions
Chemical Effects of Electric Current
Coal and Petroleum
Combustion and Flame
Conservation of Plants and Animals
Crop Production and Management
Force and Pressure
Friction
Light
Materials Metals and Non-Metals
Microorganisms Friend and Foe
Reaching the Age of Adolescence
Reproduction in Animals
Some Natural Phenomena
Sound
Synthetic Fibres and Plastics
Q. A certain fungus grows at a rate of 25% per day. If the initial weight of the fungus is 200 grams, what will be its weight after 4 days?
Q. A certain type of yeast ferments sugar at a rate of 10 grams per hour. How much sugar will be fermented in 8 hours?
Q. A child is 10 years old. If they grow 2 years older every year, how old will they be in 5 years?
Q. A child is 9 years old and will celebrate their birthday in 3 months. How old will they be in 1 year?
Q. A company recycles 300 kg of plastic waste. If 25% of it is used to make new products, how much plastic is used?
Q. A conservation area is 60% forest and 40% grassland. If the total area is 500 acres, how many acres are forest?
Q. A conservation program aims to plant 500 trees each year. If they have already planted 1200 trees, how many more years will it take to reach a goal of 3000 trees?
Q. A conservationist is studying a population of turtles. If the population doubles every 3 years and starts with 20 turtles, how many turtles will there be after 9 years?
Q. A factory produces 1200 kg of plastic per day. How much plastic will it produce in 15 days?
Q. A farmer harvested 3000 kg of potatoes from 1.5 hectares. What is the harvest per hectare?
Q. A farmer has 10 acres of land and decides to plant soybeans on 60% of it. How many acres will be planted with soybeans?
Q. A farmer sells his produce at $2.00 per kg. If he sells 250 kg, how much money does he make?
Q. A farmer uses 200 kg of fertilizer for 5 acres of land. How much fertilizer is used per acre?
Q. A field has a length of 100 meters and a width of 50 meters. If the farmer wants to plant rice in the entire field, how many square meters of land will be used?
Q. A group of friends are aged 11, 12, 13, and 14. What is the average age of the group?
Q. A lab has 3 types of bacteria. If the ratio of type A to type B to type C is 2:3:5 and the total number of bacteria is 100, how many of type B are there?
Q. A national park has 2500 acres of land. If 30% of it is designated for wildlife conservation, how many acres are left for recreational use?
Q. A person is 14 years old. If they were born in 2009, what year is it now?
Q. A petri dish contains 200 bacteria. If 10% die every hour, how many bacteria will remain after 3 hours?
Q. A plastic bottle weighs 20 grams. If a factory produces 1500 bottles in a day, what is the total weight of the bottles produced in grams?
Q. A plastic container costs $2.50 each. If a retailer buys 100 containers, what is the total cost?
Q. A plastic product is sold for $15. If the production cost is $10, what is the profit percentage?
Q. A synthetic fiber is made from 60% polyester and 40% nylon. If you have 200 grams of this fiber, how many grams of polyester are there?
Q. A tree planting initiative aims to plant 2000 trees in 5 years. If they have already planted 800 trees, how many trees do they need to plant each year for the next 4 years?
Q. A virus can infect a cell every 5 minutes. If a cell can be infected by 3 viruses at a time, how many cells can be infected in 1 hour?
Q. A wildlife reserve has 150 deer. If the population increases by 15% each year, how many deer will there be after 2 years?
Q. At what age does a person typically enter adolescence?
Q. How can friction be minimized during the insertion of a catheter?
Q. How many layers does the cell membrane consist of?
Q. If a cell has a total of 46 chromosomes, how many chromosomes will each daughter cell have after mitosis?