MATH (*)

Five swimmers are entered into a competition. Four of the swimmers have had their turns. Their scores are 9.8 s, 9.75 s, 9.79 s, and 9.81 s. What score must the last swimmer get in order to win the competition?

Answer explanation

Analysis: We must order these decimals from least to greatest. Then we must determine how the least compares with the winning score. The least decimal is 9.75. Now we must determine how 9.75 compares with the winning score.

Ellen wanted to buy the following items: A DVD player for $49.95, a DVD holder for $19.95 and a personal stereo for $21.95. Does Ellen have enough money to buy all three items if she has $90 with her?

Answer explanation

Analysis: The phrase enough money tells us that we need to estimate the sum of the three items. We will estimate the sum by rounding each decimal to the nearest one. We must then compare our estimated sum with $90 to see if she has enough money to buy these items.

Pail A had 4.5 L of water. Pail B had 1.25 L of water less than Pail A. Some water was poured from pail A to pail B. In the end, pail B had 4 times as much water as pail A. How much water did pail A have in the end?

Answer explanation

1.55 L of water

Gil had $18.70 less than Sasha. After Gil saved another $8.40 and Sasha spent $6.60. How much less money did Gil have than Sasha?

Answer explanation

$3.70

Mona has 5.25 kilograms of rice. She made three recipes and used 1.25 kilograms in each of the first two and 1.5 kilograms in the third one. How much rice is left with Mona?

Answer explanation

1.25 kg

In a supermarket, the merchant wants to divide 6.95 kg of sugar into 15 paper bags. If each bag can hold 450 g,how many more grams of sugar are needed to fill the 16th bag completely?

Answer explanation

250g

Ahmed is holding a box of antiques packed in sponge. The total weight of the contents of the box is 5.4 kg.The box contains 11 big antiques each weighing 255 g and 9 small antiques each weighing 140 g.What is the weight of the sponge in kilograms?

Answer explanation

1.335 kg

A craftsman wants to make small statues of silver and copper. If each statue is made of 0.32 kilograms of copper and 0.65 kilograms of silver, how many grams of silver and copper are needed to make 8 statues?

Answer explanation

7,760 g

Fernando's Taffy Shop made 99.12 kilograms of taffy in 7 days. How much taffy, on average, did the shop make per day?

Answer explanation

14.16

What is the area of the shaded region?

• 20 sq cm
• 4 sq cm
• 30 sq cm
• 24 sq cm