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# Tip #39 to Get a Top SAT Math Score (page 2)

By McGraw-Hill Professional
Updated on Sep 10, 2011

Answer to Brian's Math Magic Trick #2: Come on, you should know that there are no elephants in Denmark! To find out how this stunning act of magic works, go to my website: www.BrianLeaf.com/Elephants.

1. C So easy. Just continue the sequence until you have seven terms: 3, 6, 12, 24, 48, 96, 192.
2. or 0.666. Still easy! Just continue the sequence until you have six terms: 112, 54, 18, 6, 2,
3. 19 Great vocab review! A prime integer is a number that is only divisible by 1 and itself. If the least number in the sequence is 11, the numbers must be 11, 13, 17, 19.
4. 9 This "medium" question is easy for us. Remember to underline the vocab; we are looking for the first odd number in the sequence. 12, 8, 10, 9.
5. D Just follow the directions closely to get the sequence: 1, 8, 22, 50, 106, 218. Then, to find the average, just add the numbers and divide by how many there are: 405/6 = 67.5.
6. B Draw a diagram to get the feel for this question. SAT Crasher's Rule #22: If a picture is described, draw it. The diagram allows you to see that on each roll the ball advances 6 – 1 = 5 cm. Since she is rolling it from the 15–cm mark to the 60-cm mark, the ball will travel 45 cm. So 45 cm divided by 5 cm per roll will need 9 rolls since 45/5 = 9.

Go to: Tip #40