Look at the series 1.5, 2.3, 3.1, and 3.9, 4.7
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1.5 +0.8=2.3
2.3+0.8=3.1
3.1+0.8=3.9
3.9+0.8=4.7
Let the present ages of son and father be x and (60 -x) years respectively.
Then, (60 - x) - 6 = 5(x - 6)
54 - x = 5x - 30
6x = 84
x = 14.
Son's age after 6 years = (x+ 6) = 20 years
Clearly, the given sequence follows the pattern:
+5, +7, +9 ... i.e., 7 + 5 = 12, 12 + 7 = 19, ... ∴Missing Number = 19 + 9 = 28. Hence, the answer is 28.
The differences between numbers are increasing by 8:
12 − 2 = 10
30 − 12 = 18
56 − 30 = 26
90 − 56 = 34
Next difference: 34 + 8 = 42
90 + 42 = 132
The pattern increases by 2 with each number.
After 9, the next number is 11.
The letter that comes next in the series D, G, K, P is V.
The pattern involves increasing the gap between consecutive letters by one each time:
D (+3) G (+4) K (+5) P (+6) V.
Series pattern is =6+9+12+15
6+6=12 is missing
5 × 2 = 10
10 × 2 = 20
20 × 2 = 40
40 × 2 = 80
If 2 x 8 = 5, 3 x 27= 11, 6x24=7 then 5 x 40=12
8/2 = 4+1 = 5
27/3= 9+2 = 11
24/6= 4+3 = 7
40/5= 8+4 = 12
The pattern of the sequence is adding 3 to the previous term, so:
1 + 3 = 4
4 + 3 = 7
7 + 3 = 10
10 + 3 = 13
...
(Adding 3 repeatedly 28 times)
88 + 3 = 91
Therefore, the 31st term of the sequence is 91.