Best Answer

113

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I contend the correct answer is not 113 but:

82

Looking at the first digit of each number from one to the next...

1 3 2 5 4

this pattern emerges:

+2 -1 +3 -1 next number in series first digit will accomodate +4, first digit will be 8

Looking at each pair of each numbers digits...

1 2 | 3 1 | 2 5 | 5 1 | 4 9

this pattern emerges in the difference between the two digits of each number:

-1 +2 -3 +4 -5 next number pair in series will accomodate +6 = 82

More answers

Lvl 2

12

Lvl 2

82

Lvl 1

80

Q: 12 31 25 51 49 What is the next number?

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31/12 = 27/12

It will be 106 because the number increase by increments of 5 10 15 20 25 30

The rule is 5 10 15 20 25 30 .... etc and accordingly the next number in the sequence will be 106

The mixed number for 31.04 is 31 1/25.

163 is the next number, look at the difference between the number, they increase by 12, 18, 24, 30, 36, so the next would be 121 + 42 = 163.

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2n + (n - 7) = -31 - n3n - 7 = -31 - n3n + n + 7 - 7 = -31 + 7 + n - n4n = -244n/4 = -24/4n = -6Check:2n + (n - 7) = -31 - n2(-6) + [(-6) - 7) =? -31 - (-6)-12 + [-6 + (-7)] =? -31 + 6-12 + (-13) =? -25-25 = -25 True

It is 43 because 31+12 = 43

next prime number after 31 = 37

what will the eight number be. 1, 7, 13, 19, 25, 31 ...

The next number in this sequence is 200.

39

25 is the only composite number out of 31, 29, 25, 23.

The next prime number after 29 is 31 followed by 37

31/12 = 27/12

The next prime number after 31 is 37

43

It is: 31/12 = 2 and 7/12