[Question]Kelsey turned 25 in 1999. Her older sister was born 3 years before Kelsey. It's currently 2021. How old is Kelsey's older sister?
[Answer]Kelsey turned 25 in 1999 so she was born in 1999 - 25 = 1974. Kelsey's sister is older by 3 years so she was born in 1974 - 3 = 1971. It's currently 2021 and Kelsey's sister was born in 1971 so she is 2021 - 1971 = 50 years old. The answer is 50.
Q: A pen and pencil have a total cost of $6. If the pen costs twice as much as the pencil, what is the cost of the pen?
A: Let x be the cost of the pencil. If the pen costs 2 times the cost of the pencil, then it costs 2x. Adding the cost of the pen and pencil we get 2x + x = 3x. Since the total cost is $6 then 3x = $6 therefore x = $6 / 3 = $2. One pen is equal to 2 * x which is 2 * $2 = $4. The answer is 4.
Question: Calen originally had 5 more pencils than does Caleb, and Caleb has 3 less than twice as many pencils as does Candy. If Calen lost 10 pencils, which left him with 10 pencils, then how many pencils does Candy have?
Answer: If Calen lost 10 pencils, which left him with 10 pencils, then Calen originally had 10 + 10 = 20 pencils. Calen originally had 5 more pencils than does Caleb, and thus Caleb has 20 - 5 = 15 pencils. Let's let "x" represent the number of pencils owned by Candy. Since Caleb has 3 less than twice as many pencils as does Candy, then (2 * x) - 3 = 15. This simplifies to 2 * x = 18. Thus, the number of pencils owned by Candy is x = 9 pencils. The answer is 9.
[Question]Zilla spent 7% of her monthly earnings on rent, half of it on her other monthly expenses, and put the rest in her savings. If she spent $133 on her rent, how much does she deposit into her savings account in a month?
[Answer]Since $133 is equal to 7% of her earnings, then 1% is equal to $133 / 7 = $19. The total monthly earning of Zilla is represented by 100%, so $19 x 100 = $1900 is her monthly earnings. So, $1900 / 2 = $950 is spent on her other monthly expenses. The total amount spent on the rent and other monthly expenses is $133 + $950 = $1083. Hence, she saves $1900 - $1083 = $817 per month. The answer is 817.
Q: Alexis can sew a skirt in 2 hours and a coat in 7 hours. How long does it take for Alexis to sew 6 skirts and 4 coats?
A: It takes Alexis 2 x 6 = 12 hours to sew 6 skirts. It takes Alexis another 7 x 4 = 28 hours to sew 4 coats. In total it takes Alexis 12 + 28 = 40 hours to sew 6 skirts and 4 coats. The answer is 40.
Question: Nadia walked 18 kilometers, which was twice as far as Hannah walked. How many kilometers did the two girls walk in total?
Answer:
Hannah = (1 / 2) 18 = 9. 9 + 18 = 27 km. Together they walked 27 kilometers. The answer is 27.