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…