In a code where '?' means addition, '?' means subtraction, and '?' means division, what is the value

Analogy

Complete Analogous Pair Simple Analogy Choose Analogous Pair Double Analogy Choose A Similar Word Detect Analogies Three Word Analogy Number Analogy Alphabet Analogy
Classification

Choose Odd Word Choose odd Pair of Words Choose odd Numbers Choose odd Number Pair / Group Choose Odd Letter Group
Series Completion

Number Series Alphabet Series Letter Series
Coding - Decoding

Letter Coding Number Coding Number To Letter Coding Substitution Mixed Letter Coding Mixed Number Coding
Blood Relations

Deciphering Jumbled Up Descriptions Relation Puzzle Coded Relations
Puzzle Test

Classification Type Questions Seating / Placing Arrangements Comparison Type Questions Sequential Order Of Things Selection Based On Given Conditions Family-Based Problems Jumbled Problems Clock Puzzels
Sequential Output Tracing

Type 1
Alphabet Test

Alphabetical Order Of Words Letter-Word Problems Rule-Detection Alphabetical Quibble Word Formation
Number-Ranking-Time Sequence

Number Sequence Ranking Sequence DateTime Sequence
Mathematical Operations

Problem-Solving By Substitution Interchange Of Signs And Numbers
Inserting the Missig Character

Type 1
Decision Making
Assertion and Reason

Type 1
Situation Reaction Test

Type 1
Verification of Truth of the Statement

Type 1
Vocabulary

Synonyms Antonyms
Grammer

Phrasal verbs
Algebra

Basic Operations & Factorization Linear Equations Quadratic Equations
Arithmetic

Numbers
Aptitude

Time & Work Time, Distance and Speed
Analogy

Complete Analogous Pair Simple Analogy Choose Analogous Pair Double Analogy Choose A Similar Word Detect Analogies Three Word Analogy Number Analogy Alphabet Analogy
Classification

Choose Odd Word Choose odd Pair of Words Choose odd Numbers Choose odd Number Pair / Group Choose Odd Letter Group
Series Completion

Number Series Alphabet Series Letter Series
Coding - Decoding

Letter Coding Number Coding Number To Letter Coding Substitution Mixed Letter Coding Mixed Number Coding
Blood Relations

Deciphering Jumbled Up Descriptions Relation Puzzle Coded Relations
Puzzle Test

Classification Type Questions Seating / Placing Arrangements Comparison Type Questions Sequential Order Of Things Selection Based On Given Conditions Family-Based Problems Jumbled Problems Clock Puzzels
Sequential Output Tracing

Type 1
Alphabet Test

Alphabetical Order Of Words Letter-Word Problems Rule-Detection Alphabetical Quibble Word Formation
Number-Ranking-Time Sequence

Number Sequence Ranking Sequence DateTime Sequence
Mathematical Operations

Problem-Solving By Substitution Interchange Of Signs And Numbers
Inserting the Missig Character

Type 1
Decision Making
Assertion and Reason

Type 1
Situation Reaction Test

Type 1
Verification of Truth of the Statement

Type 1

In a code where '?' means addition, '?' means subtraction, and '?' means division, what is the value of 20 ? 10 ? 5 ? 2?