10121568?20513827 Which is the missing number?

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10	12	15
68	?	20
51	38	27

വിട്ടുപോയ സംഖ്യ ഏത് ?

A112

B97

C87

D107

Answer:

C. 87

Read Explanation:

10

10+2

=12

12 + 3

=15

51 + 17

= 68

68 + 19

=87

15 + 5

= 20

38 + 13

= 51

27 + 11

= 38

20 + 7

= 27

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