Answer this question:Out of the 400 emails that Antonia received in her mail, 1/4 were spam emails, while 2/5 of the remaining emails were promotional messages. If the rest of the emails were important emails, calculate the total number of important emails in her inbox.
Out of the 400 emails, 1 / 4 * 400 = 100 emails were spam emails. The number of emails that were not spam emails is 400 - 100 = 300. 2 / 5 of the emails which were not spam were promotional emails, a total of 2 / 5 * 300 = 120 emails. If the rest of the emails were important emails, there were 300 - 120 = 180 important emails.
The answer is 180.

Answer this question:Twelve coworkers go out for lunch together and order three pizzas. Each pizza is cut into eight slices. If each person gets the same number of slices, how many slices will each person get?
The total number of slices is 3 8 = 24. Every one of the colleagues gets 24 / 12 = 2 slices per person.
The answer is 2.

Answer this question:Alice has 20 quarters. She wants to exchange them for nickels and so she goes to the bank. After getting back from the bank, she discovers that 20% of the nickels are iron nickels worth $3 each. What is the total value of her money now?
A quarter is worth five nickels because .25 / .05 = 5. She gets 100 nickels from the bank because 20 x 5 = 100. 20 of the nickels are iron nickels because 100 x .20 = 20. 80 of the nickels are regular because 100 - 20 = 80. The iron nickels are worth $60 because 20 x 3 = 60. The regular nickels are worth $4 because 80 x .05 = 4. Her money is now worth $64 because 60 + 4 = 64.
The answer is 64.

Answer this question:Charlie owns one flute, two horns, and a harp. Carli owns twice as many flutes as Charlie, half as many horns as Charlie, but no harps. What is the combined total number of musical instruments owned by Charlie and Carli?
Charlie owns one flute, two horns, and a harp for a total of 1 + 2 + 1 = 4 instruments. Twice as many flutes as Charlie is 2 * 1 = 2 flutes,. Half as many horns as Charlie is 2 / 2 = 1 horn. Thus, Carli owns 2 + 1 = 3 instruments. Therefore, the combined total number of musical instruments owned by Charlie and Carli is 4 + 3 = 7 instruments.
The answer is 7.