Mathematical Coding in Reasoning

In Mathematical / Operator Coding Questions, new pattern of Reasoning, digits of a number may be consider individually and Operator may different from the given symbol. Concept and Questions for SSC CGL, CPO, CHSL, RRB and Competitive Exams in Hindi and English.

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Mathematical Coding in Reasoning

In this type of Coding Questions, digits of a number may be consider individually and Operator may different from the given symbol. Therefore, it necessary to practice the questions in solve in the examination.

Examples: 1

In a coded language, 8/3 =4, and 7/6 =2. What is the code of 9/3

Options : (a) 1, (b) 4, (c) 6, (d) 7

Solution

8×3 =24 , Take unit digit as code i.e 4
7×6 =42, Take unit digit as code i.e 2

Similar manner 9×3 =27 and unit digit is 7

Answer is (d) 7

Example 2:

2-2 =2, 4-4 =12 and 6-6 =30, what is 8-8 = ?

Options : (a) 12, (b) 42, (c) 60, (d) 56

Solution

Square of 2 -2 =4-2 =2
and Square of 4-4 =16-4 = 12
Similarly Square of 6-6 = 36-6 =30

Therefore, Square of 8 -8 = 64-8 = 56, Answer is (d)

Example 3:

16-2 =2 , 9-3 = 0, 81 -1 =8, 64-4 = ?

Square root of 16 is 4-2 =2
3-3 =0, 9-1=8

Therefore, 8-4 =4

Example 4:

20+15 =24 -> (2+0) + (1+5) = 2 +6 = 8, 8×3 =24

64+13 =42 -> 10+4 =14, 14×3 =42

11+28 = ? -> 2+10 =12×3 = 36

Example 5:

54 + 43 =2 , (5-4) + (4-3) = 1 + 1 =2

60 + 51 =10, (6-0) + (5-1) = 6 +4 =10

62 + 72 = ? , (6-2) + (7-2) = 4+5 = 9

Mathematical Coding in Reasoning

Example 6: CGL-2014

16×13 =280. 16×13 = 208, Interchange unit and Tenth Digit = 280

14×13 =128, 14×13 = 182 -> 128

15×11 = ? , 15×11 = 165 -> 156

Example 7

94+31+22 =43, 56+85+28 =86, 27+45+25 = ?

94+31+22 =43, 9×4+3×1 + 2×2 = 36+3+4 = 43

56+85+28 =86, 5×6 +8×5 + 2×8 = 30+40+16 = 86

27+45+25 = ? 2×7 + 4×5 + 2×5 = 14+20+10 =44

Coding Questions for Practice

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