Select the option that is related to the third number in the same way as the second number is related to the first number.
11 : 143 : : 15 : ?
- A255
- B277
- C248
- D263
Solution & Step-by-step Explanation
Let's find the relation between 11 and 143:
11×13=143
Here, 13 can be expressed as (11+2).
So the pattern is: Number×(Number+2)
Alternatively: 11
2
+2×11=121+22=143.
Applying the same pattern to 15:
Required Number=15×(15+2)
Required Number=15×17=255
Let's double-check with the alternate form: 15
2
+2×15=225+30=255.
11×13=143
Here, 13 can be expressed as (11+2).
So the pattern is: Number×(Number+2)
Alternatively: 11
2
+2×11=121+22=143.
Applying the same pattern to 15:
Required Number=15×(15+2)
Required Number=15×17=255
Let's double-check with the alternate form: 15
2
+2×15=225+30=255.