Number Series Completion - Study Mode

[#96] 5.2, 4.8, 4.4, 4, ... What number should come next?
Correct Answer

(D) 3.6

Explanation

Solution: In this simple subtraction series, each number decreases by 0.4.

[#97] 8, 6, 9, 23, 87 , ... What number should come next?
Correct Answer

(D) 429

Explanation

Solution: 8 x 1 - 2 = 6 6 x 2 - 3 = 9 9 x 3 - 4 = 23 23 x 4 - 5 = 87 87 x 5 - 6 = 429 ...

[#98] 28, 25, 5, 21, 18, 5, 14, ... choose which pair of numbers comes next?
Correct Answer

(A) 11, 5

Explanation

Solution: This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.

[#99] 8, 11, 21, 15, 18, 21, 22, ... choose which pair of numbers comes next?
Correct Answer

(B) 25, 21

Explanation

Solution: This is an alternating addition series, with a random number, 21, interpolated as every third number. The addition series alternates between adding 3 and adding 4. The number 21 appears after each number arrived at by adding 3.

[#100] 9, 16, 23, 30, 37, 44, 51, ... choose which pair of numbers comes next?
Correct Answer

(D) 58, 65

Explanation

Solution: Here is a simple addition series, which begins with 9 and adds 7.