Rain is falling at a rate of 3 centimeters per hour all over Springfield. Somewhere downtown in Springfield a group of pigeons is waiting for the rain to stop. If the rain filled a round puddle the with a base area of 350 square centimeters and a depth of 13.5 centimeters, how long did the pigeons wait for the rain to stop?
Answer(s): B
The volume of the puddle is irrelevant since rain fell all over the city. Thus, you should relate to the depth that fell only. 13.5 / 3 = 4.5 hours of rain.
Ronald is now 4.5 years older than Andrew and third of that amount older than Ingrid. If in 0.5 years, Ronald will be three times older than Andrew, then in 2.25 years what would be Ingrid’s divided by Andrew’s age multiplied by Ronald’s age?
Answer(s): D
Translate piece by piece into numbers. R (Ronald) = A (Andrew) + 4.5. The second equation: R = I (Ingrid) + 1.5.The third equation: R + 0.5 = 3(A + 0.5). We have three equations with three variables.Ronald is 6.25, Ingrid is 4.75 and Andrew is 1.75. In 2.25 years, Ronald will be 8.5, Ingrid will be 7 and Andrew will be 4. The answer is: 7 / 4 x 8.5 = 14.875.
Richard is now 14.5 years older than Arthur and half of that amount older than Sam. If in 2.75 years, Richard will be twice and a half older than Arthur, then in 7 years what would be Arthur’s age approximately?
Translate piece by piece into numbers. R (Richard) = A (Arthur) + 14.5. The second equation: R = S (Sam) +7.25.The third equation: R +2.75 = 2.5(A + 2.75). We have three equations with three variables.□ Today Arthur’s age is approximately 6.9 (take 7). In 7 years he would be about 14 years old.
In 13.5 years Stacy will be as old as Carolyn is now. Thirty two years ago Carolyn was two and a half the age of Stacy. How old will Stacy be a decade from now?
Answer(s): C
Translate the data into numbers: s (Stacey) + 13.5 = c (Caroline) and 2.5(s-32) = c – 32. From the equations Today Stacy is 41 years old, in a decade from now she will be 51.
X years in the future, Zach will be Y years old. Z years in the future, Zach will be how old?
Write the following equations: Zach + X = Y and Zach + Z =?Put Zach from the first equation and place it in the second one: Y – X + Z is the age in Z years.
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