Question

In the following number-pairs, the second number is obtained by applying certain mathematical operations to the first number. Select the set in which the numbers are related in the same way as are the numbers of the following sets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 - Operations on 13 such as adding/subtracting/multipling to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.) 27, 109 31, 125

• A. 35, 144
• B. 36, 145
• C. 35, 145
• D. 36, 144

Answer 1

Answer:

B. 36, 145

Look for a pattern relating the numbers:

Check:

• $(27 \rightarrow 109)$
  $27 \times 4 + 1 = 108 + 1 = 109$
  

• $(31 \rightarrow 125)$
  $31 \times 4 + 1 = 124 + 1 = 125$
  

Pattern:
$\text{Number} \times 4 + 1$

Final Answer:

Multiply the first number by 4 and add 1