Q: In a grocery store, Julia bought 2 pieces of Snickers and 3 packs of M&M's. If each piece of Snickers costs $1.5 and a pack of M&M's has the same cost as 2 Snickers, how much is Julia's change if she gave the cashier 2 $10 bills?
A: Two pieces of snickers cost $1.5 x 2 = $3. One pack of M&M's costs $3 so 3 packs cost $3 x 3 = $9. The total amount that she needs to pay is $3 + $9 = $12. Julia gave the cashier $10 x 2 = $20. So, her change is $20 - $12 = $8. The answer is 8.

Q: Rubert has 4 times the number of candies James has. James has 3 times the number of candies Adam has. If Adam has 6 candies, how many candies do the three of them have in total?
A: James has 3 * 6 candies = 18 candies. Rubert has 4 * 18 candies = 72 candies. So, the three of them have 6 candies + 18 candies + 72 candies = 96 candies. The answer is 96.

Q: At Mario's barbershop haircuts are 50% more expensive during the weekends. If Mario paid $18 for his last haircut on Monday, how much he would have paid the day before?
A:
Mario's $18 cut on Monday would have been 50% more expensive on Sunday or $18 * 50% = $9 more expensive. That means he would have paid $9 more on Sunday than what he paid ($18) on Monday or $9 + $18 = $27. The answer is 27.