James had two browsers on his computer. In each browser, he opened three windows, each with ten tabs. What's the total number of tabs he opened in all the browsers together?
Let's think: The total number of tabs in three windows of each browser is 10 * 3 = 30 tabs. If James had two browsers on his computer and in each browser he opened three windows, the total number of tabs in the two browsers is 2 * 30 = 60 tabs.. The answer is: 60.

Out of the 200 students in a class, thirty percent like the color blue. Among the remaining students who don't like the color blue, 40% like the color red, and the rest like the color yellow. Calculate the combined number of students who like the color yellow and the color blue.
Let's think: The number of students who like the color blue is 30 / 100 * 200 = 60. Out of the 200 students in the class, 200 - 60 = 140 don't like the color blue. Among the students who don't like the color blue, 40 / 100 * 140 = 56 students like the color red. If the rest of the students like neither blue nor red and only like the color yellow, their number is 140 - 56 = 84. The total number of students who like the color yellow and those who like the color blue is 84 + 60 = 144.. The answer is: 144.

Vinnie is writing an essay and needs to make sure that he has not exceeded the 1000-word limit. He wrote 450 words on Saturday and 650 words on Sunday. How many words has Vinnie exceeded the limit by?
Let's think: Vinnie has written a total of 450 words on Saturday + 650 words on Sunday = 1100 words. He has therefore exceeded the limit by 1100 written words – 1000 word limit = 100 words.. The answer is: 100.

Jim is a maintenance worker at a pool. Every time someone jumps in the pool, they cause 400 ml of water to splash out and evaporate. Jim has to get everyone out of the pool, clean, and refill it when it gets below 80% full. If the pool holds 2000 L of water, how many times can people jump in the pool before Jim has to clean it?
Let's think:
First figure out how many liters of water are left in the pool when it's 80% full: 2000L * .8 = 1600 L. Now subtract that amount from the pool's total capacity to find how much water can splash out before Jim has to refill it: 2000 L - 1600 L = 400 L. Now multiply that amount by 1000 to convert it to milliliters: 400 L * 1000 ml / L = 400,000 ml. Finally, divide that amount by the amount that splashes out with each jump to find the number of jumps before pool cleaning: 400,000 ml / 400 ml / jump = 1000 jumps.. The answer is: 1000.