Question

find the missing number in this triangle​

Answer 1

Question :- 7 - 51 - 13 - 36 - 721 - ? . Find the Missing Number in given Triangle .

Options :- A) 190 B) 122 C) 632 D) 552

Answer :-

Logic :- Reverse of (Previous Number * 2 + 1) = Next Number.

Lets Check :-

→ 7 * 2 + 1 = 14 + 1 = 15 => Reverse = 51 .

Similarly,

→ 15 * 2 + 1 = 30 + 1 = 31 => Reverse = 13 .

Similarly,

→ 31 * 2 + 1 = 62 + 1 = 63 => Reverse = 36 .

Similarly,

→ 63 * 2 + 1 = 126 + 1 = 127 => Reverse = 721 .

Therefore, we will Apply same Logic in Next :-

→ 127 * 2 + 1 = 254 + 1 = 255 => Reverse = 552 . (Option D) (Ans.)

Hence, Correct Answer will be 552.

Answer 2

AnswEr:-

→ 7 * 2 + 1 = 14 + 1 = 15 => Reverse = 51 .

Similarly,

→ 15 * 2 + 1 = 30 + 1 = 31 => Reverse = 13 .

Similarly,

→ 31 * 2 + 1 = 62 + 1 = 63 => Reverse = 36 .

Similarly,

→ 63 * 2 + 1 = 126 + 1 = 127 => Reverse = 721 .

Apply same Logic in Next :-

→ 127 * 2 + 1 = 254 + 1 = 255

=> Reverse = 552 .

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