# Number Series Questions and Answers page 4

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16) 80, 10, 70, 15, 60, … What number should come next?

Answer: 20

Explanation:1st: 80, 70, 60, …. 2nd: 10, 15, ….. (-10 in 1sr series, + 5 in 2nd series) So, 15 + 5 = 20

17)2, 6, 18, 54, … What number should come next?

Answer: 162

Explanation: x3, So, 54 x 3 = 162

18) 5.2, 4.8, 4.4, 4, … What number should come next?

Answer: 3.6

Explanation: – 0.4, So, 4 – 0.4 = 3.6

19) 8, 6, 9, 23, 87 , … What number should come next?

Answer: 429

Explanation: x1 -2, x2 – 3, x3 – 4, …….. So, 87×5-6 = 429

20) 100, 52, 28, 16, …. What number should come next?

Answer: 10

Explanation: /2 +2, So, 16/2 = 8 + 2 = 10

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