Which one will replace the question mark ?
Answer: Option B
Explanation:
1 + 2 + 3 + 4 = 10
and 1 + 3 + 5 + 8 = 17
Similarly, 1 + 4 + 6 + 9 = 20.
Answer: Option C
(4 + 8) x 9 = 108
(5 + 4) x 12 = 108.
For first triangle,
10 - 4 = 6
18 - 10 = 8
18 - 4 = 14
For second triangle,
14 - 8 = 6
22 - 14 = 8
22 - 8 = 14
For third triangle,
11 - 5 = 6
15 - 11 = 4
15 - 5 = 10.
Answer: Option D
(2 x 2 - 1) = 3
and (5 x 4 - 5) = 15
(5 x 5 - 3) = 22.