Monday, 6 Apr 2020

Civil Service Complete Reviewer on Numerical Reasoning Practice Test

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:

  1. 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. 81 – you can get this by squaring the numbers (1×1=1), (2×2=4), (3×3=9) and so on…
  3. -144 – subtract the 3rd and 1st to get the 2nd number, do the same to the next 3 sets
  4. IR KP – Use the equivalent ascending and descending letters in the alphabet
  5. P15625 – the pattern is the next 2 letters from the alphabet and the number multiplied by 5 to get the next one…
  6. -9 –positive + negative numbers is to subtract them and follow the sign of the bigger number
  7. 124 – positive – negative numbers is to change the sign of the subtrahend and follow the rules in addition
  8. 198 – multiplying numbers with similar signs = positive
  9. -100 – already explained
  10. -80 – dividing numbers with different signs = negative

 

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