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ANSWER KEY 1

1. **(b) next number in the sequence is 3.** Notice that the numbers in the pattern were divided by 3 to get the next number. Therefore, you divide 2187 by 3 you’ll get 729, then the next and so on.

2. **(c) 81 – **you can get this by squaring the numbers (1×1=1), (2×2=4), (3×3=9) and so on…

3. **(d) -144 –** subtract the 3rd and 1st to get the 2nd number, do the same to the next 3 sets

4. **(a) IR KP –** Use the equivalent ascending and descending letters in the alphabet

5. **(b) P15625 – **the pattern is the next 2 letters from the alphabet and the number multiplied by 5 to get the next one…