Question

Nex
२७. खालील अंकमालिकेत प्रश्नचिन्हाच्या जागी कोणता अंक येईल ?
43,65, 78,69, ?
(1) 91 25 (2) 81
(3) 89
(4)92
55. What figure should come in place of the question mark in the following number series
(1) 91
(2) 81
(3) 89
(4)92​

Answer 1

The missing number(?) is "option (4) 92" is the required answer.

Step-by-step explanation:

The given series are

43,65, 78,69, ?

65 = 43 + 22,

78 = 65 + (22 - 9) = 65 + 13

69 = 78 + (13 - 21) = 78 - 9 = 69

Similarly,

? = 69 + (21 + 12) = 69 + 33 = 92

Hence, the missing number(?) is "option (4) 92" is the required answer.