Mathematics Problem Solving

Kong took 15% fewer seconds than Nolan took to complete his multiplication timed test. Kong took 85 seconds. How many seconds did Nolan take?

• 98 seconds

• 100 seconds

• 95 seconds

• 90 seconds

Tags

CCSS.6.RP.A.3C

Ayden had a goal of finishing painting at least 80% of the 500 square meters of a house's walls by today. He actually finished painting 415 square meters today. Did Ayden meet his goal? Why?

• Yes, because 80% of 500 is 400, and he painted more than that.

• No, because 80% of 500 is 450, and he painted less than that.

• Yes, because 80% of 500 is 415, which is exactly what he painted.

• No, because 80% of 500 is 420, and he painted less than that.

A swimming pool had 2.5 million liters of water in it. Some water evaporated, and then the pool only had 2 million liters of water in it. What percent of the water evaporated?

• 10%

• 15%

• 20%

• 25%

Tags

CCSS.6.RP.A.3C

Oliver read for 450 minutes this month. His goal is to read for 10% more minutes next month. If Oliver meets his goal, how many minutes will he read in all during the two months?

• 900 minutes

• 945 minutes

• 990 minutes

• 1000 minutes

Tags

CCSS.6.RP.A.3C

Finley's pumpkin had a mass of 6.5 kilograms before he carved it. After it was carved, the pumpkin had a mass of 3.9 kg. What was the percent decrease in the mass of the pumpkin?

• 35%

• 40%

• 45%

• 50%

Tags

CCSS.6.RP.A.3C

The family-size bottle of sunscreen holds 12 fluid ounces of sunscreen. The regular bottle holds 75% less. How many fewer fluid ounces does the regular bottle of sunscreen hold?

• 6 fluid ounces

• 8 fluid ounces

• 9 fluid ounces

• 10 fluid ounces

Tags

CCSS.6.RP.A.3C

Haruka hiked several kilometers in the morning. She hiked only 6 kilometers in the afternoon, which was 25% less than she had hiked in the morning. How many kilometers did Haruka hike in all?

• 12 km

• 14 km

• 16 km

• 18 km

Tags

CCSS.6.RP.A.3C

In a video game, Val scored 30% fewer points than Peeta. Peeta scored 1060 points. How many points did Val score?

• 742 points

• 800 points

• 870 points

• 910 points

Tags

CCSS.6.RP.A.3C

Cody was 165 cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year. How tall was Cody on the first day of school last year?

• 145 cm

• 150 cm

• 155 cm

• 160 cm

Tags

CCSS.6.RP.A.3C

There are 20% more goblins than wizards in the magic club. There are 120 goblins in the club. How many wizards are in the club?

• 80 wizards

• 90 wizards

• 100 wizards

• 110 wizards

Tags

CCSS.6.RP.A.3C