This must be done in your head only. Do NOT use paper and pencil or a calculator. Try it.
Take 1000 and add 40 to it. Now add another 1000. Now add 30. Add another 1000. Now add 20. Now add another 1000. Now add 10. What is the total?
1000+1000+1000+1000=4000 40+30+20+10=100 So, 4000+100 = 4100.
4100(trick- add the thousands first then the rest)
A pattern of triangles is shown below. Fill in the table for figure 5. Calculate the total number of triangles in figure 250. Calculate the percentage of grey triangles in figure 250.
A school bus travels from Delhi to Mumbai. There are four children in the bus. Each child has four backpacks with him. There are four dogs sitting in each backpack. Every dog has four puppies with her. All these dogs have four legs, with four toes at each leg.
Can you calculate the total number of square in the given figure?
