Question: When Matty was born, the cost of a ticket to Mars was $1,000,000. The cost is halved every 10 years. How much will a ticket cost when Matty is 30?
Answer with step-by-step thinking: First find the total number of times the cost is halved: 30 years / 10 years / halving = 3 halvings. Then halve the cost once: $1,000,000 / 2 = $500,000. Then halve the cost a second time: $500,000 / 2 = $250,000. Then halve the cost a third time: $250,000 / 2 = $125,000.
So the answer is 125000.


Question: Lisa has decided to replace her old cutlery. As she is going through the cupboards, she sees the spoons from when each of her 4 children were babies as well as 2 decorative spoons she created. She doesn't want to get rid of any of these so she adds them to her new set of cutlery. The new set of cutlery has 10 large spoons and 15 teaspoons. If the children each had 3 spoons when they were babies, how many spoons does Lisa now have?
Answer with step-by-step thinking: From the baby spoons, Lisa holds 4 children * 3 spoons each = 12 baby spoons. Adding this to the decorative spoons means Lisa has 12 baby spoons + 2 decorative spoons = 14 old spoons. In the new set of cutlery, there is a total of 10 large spoons + 15 teaspoons = 25 new spoons. So in total, Lisa has 14 old spoons + 25 new spoons = 39 spoons.
So the answer is 39.


Question: Jane is shopping for some fruit. She sees a stand of fruit advertising 10 apples for $2, and another one advertising 5 oranges for $1.50. Assuming there's no price discount for buying in bulk, how much would Jane spend in cents if she bought 12 of the cheaper of the two fruits?
Answer with step-by-step thinking:
First, we need to find out which fruit is cheaper individually. We start by figuring out the price for a single apple by performing 200 / 10 = 20 cents per apple. Then we find out the price of an individual orange, by performing 150 / 5 = 30 cents per orange. Since 20<30, the apples are cheaper. To determine the answer, we multiply 20 * 12 = 240 cents.
So the answer is 240.