Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| 3 | 45 | 36 |
| 4 | ? | 166 |
| 2 | 3 | 13 |
Option 1: 110
Option 2: 100
Option 3: 90
Option 4: 80
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Correct Answer: 90
Solution :
The 4th root of the sum of the second and third numbers equals the first number –
Row I:
45 + 36 = 81; $\sqrt[4]{81}$ = 3
Row III:
3 + 13 = 16; $\sqrt[4]{16}$ = 2
Similarly, in
Row II:
166 + X = 4
4
⇒ X = 256 – 166
⇒ X = 90
So, the missing number is 90. Hence, the third option is correct.
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