# Civil Service Complete Reviewer on Numerical Reasoning Practice Test

1. 2187, 729, 243, 81, 27, 9, ____?

a. 6

b. 3

c. 4

d. 2

2. 1, 4, 9, 16, 25, 36, 49, 64, ___ ?

a. 72

b. 75

c. 81

d. 90

3. 13 -21 34 -55 89 ___?

a. -95

b. 104

c. -123

d. -144

4. AZ CX EV GT ____?

a. IR KP

b. IR KQ

c. IS KQ

d. IS KP

5. A5 D25 G125 J625 M3125 ____?

a. P15525

b. P15625

c. O15525

d. O15625

6. What is -25 + 16?

a. 9

b. -9

c. -41

d. 41

7. What is 107 – (-17) ?

a. -90

b. 90

c. 124

d. -124

8. (-9) (-22) = ____?

a. 198

b. -198

c. 31

d. -31

9. (21) (-4) + (8) (-2) = ____?

a. -100

b. 100

c. -23

d. 23

10. (-560) ÷ 7 = ___?

a. -80

b. 80

c. -553

d. 553

**Answer Key:**

- 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.
- 81 – you can get this by squaring the numbers (1×1=1), (2×2=4), (3×3=9) and so on…
- -144 – subtract the 3rd and 1st to get the 2nd number, do the same to the next 3 sets
- IR KP – Use the equivalent ascending and descending letters in the alphabet
- P15625 – the pattern is the next 2 letters from the alphabet and the number multiplied by 5 to get the next one…
- -9 –positive + negative numbers is to subtract them and follow the sign of the bigger number
- 124 – positive – negative numbers is to change the sign of the subtrahend and follow the rules in addition
- 198 – multiplying numbers with similar signs = positive
- -100 – already explained
- -80 – dividing numbers with different signs = negative

**Read More:**

**Civil Service Complete Reviewer on Clerical Operations****Civil Service Complete Reviewer on Clerical Operations 1****Civil Service Complete Reviewer on Numerical Reasoning Practice Test**