Irin, Ingrid and Nell bake chocolate chip cookies in the ratio of 9.18: 5.17: 2.05. If altogether they baked a batch of 148 cookies, what percent of the cookies did Nell bake?
Answer(s): C
Add the numbers in the ratio to get 9.18 + 5.17 +2.05 = 16.4.You don’t need to relate to the number of cookies, it doesn’t contribute anything. The relative part of Nell is 2.05/16.4 = 0.125 = 12.5%
Of 15 players on a basketball team, one third is left handed. Out of the right-handed players there are 80% over 2 meters high. Assuming that out of the left handed players there are 40% players fewer than 2 meters. How many players are there over 2 meters in height?
Answer(s): E
Start from the top. One third are left handed (5). Out of the right-handed players there are 8 players over 2 meters. 40% of 5 are 2 players. All together over 2 meters there are 10 players.
On a map, 1.5 inches represent 24 miles. How many miles approximately is the distance if you measured 47 centimeters assuming that 1-inch is 2.54 centimeters?
Answer(s): D
Dividing the number of centimeters in 2.54 gives you the number of inches: 47/2.54 = 18.5 inches. 1.5 inches represent 24 miles, 1 inch represents 16 miles.(18.5 inches) x (16 miles) = 296 miles.
On a mechanical gear, 6 teeth represent a movement of 1.2 radians. The gear is connected to a wheel that moves twice as much. If the wheel moved 276 degrees how many teeth did the gear move assuming the each radian is approximately 60 degrees?
Answer(s): A
The wheel moved 276 degrees the gear moved 138 degrees / 60 = 2.3 radians.1.2 radians are 6 teeth one radian is 5 teeth’s. 2.3 x 5 = 11.5 teeth movement.
A rotameter is a device that measures flow of liquid and gases. When measuring liquid phase flows, 2.5 inches represent 60 liters per minute of liquid. With gas measurements the rotameter moves 50% of the movement he moves with the liquid phase. How many liters of gas passed through the rotameter if it measured 4 inches?
Answer(s): B
The rotameter moves 50% of 2.5 meaning 1.25 inches is 60 liters of gas.The rotameter moved 4 inches. 4/1.25 = 3.2 x 60 liters is 192 liters measured.
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