What is Wrong (Logic)?

S0-SA3-0478

Grade Level:

Pre-School – Class 2

All domains without exception

Definition

What is it?

When we say 'What is wrong?', we are looking for something that does not fit, is incorrect, or goes against a rule or expectation. It means identifying an error or a mismatch in a given situation or set of information. It's about spotting the mistake.

Simple Example

Quick Example

Imagine you have four cricket balls: three are red, and one is blue. If someone asks, 'What is wrong with this group of balls?', the 'wrong' one is the blue ball because all the others are red. It doesn't match the pattern.

Worked Example

Step-by-Step

PROBLEM: Your mother asked you to buy 1 kg of potatoes, 500g of onions, and 2 litres of milk. You come home with 1 kg of potatoes, 1 kg of onions, and 2 litres of milk. What is wrong?
---STEP 1: Identify what was asked. You needed 1 kg potatoes, 500g onions, 2 litres milk.
---STEP 2: Identify what you brought. You brought 1 kg potatoes, 1 kg onions, 2 litres milk.
---STEP 3: Compare each item. Potatoes: 1 kg asked, 1 kg brought (Correct). Milk: 2 litres asked, 2 litres brought (Correct).
---STEP 4: Compare the last item. Onions: 500g asked, 1 kg brought (Incorrect).
---STEP 5: State the wrong part. The quantity of onions is wrong.
ANSWER: You brought 1 kg of onions instead of 500g.

Why It Matters

Understanding what is wrong helps us solve problems, make better decisions, and improve things around us. It's crucial for engineers who fix machines, doctors who diagnose illnesses, and even app developers who find bugs in their code. This skill helps you think critically in any field.

Common Mistakes

MISTAKE: Focusing on what is 'different' rather than what is 'incorrect' based on a rule or context. | CORRECTION: Always check if the 'different' item actually breaks a rule, a pattern, or a specific requirement given in the problem.

MISTAKE: Not reading the instructions or conditions carefully before looking for what is wrong. | CORRECTION: First, fully understand the correct pattern, rule, or expectation. Then, compare each part to that understanding.

MISTAKE: Guessing what is wrong without proper reasoning. | CORRECTION: Always provide a clear reason or evidence for why something is wrong, linking it back to the given correct information or rule.

Practice Questions

Try It Yourself

QUESTION: A sequence is 2, 4, 6, 8, 9, 12. What number is wrong? | ANSWER: 9 (because the pattern is adding 2 each time, so after 8 it should be 10, not 9)

QUESTION: Your friend says, 'The auto-rickshaw ride to school costs Rs. 50, and my school is 10 km away.' What is wrong with this statement if autos usually charge around Rs. 10-12 per km in your city? | ANSWER: The cost is likely wrong. For 10 km, Rs. 50 is too low if the per km charge is Rs. 10-12 (it should be Rs. 100-120).

QUESTION: You are making chai for guests. The recipe says: 2 cups water, 1 cup milk, 2 spoons sugar, 1 spoon tea powder. You use: 2 cups water, 2 cups milk, 2 spoons sugar, 1 spoon tea powder. What is wrong? | ANSWER: The quantity of milk is wrong. You used 2 cups of milk instead of 1 cup.

MCQ

Quick Quiz

Look at the list of items: Apple, Banana, Potato, Orange. What is wrong in this list?

Apple

Banana

Potato

Orange

The Correct Answer Is:

Potato is the correct answer because Apple, Banana, and Orange are all fruits, while Potato is a vegetable. It doesn't fit the category.

Real World Connection

In the Real World

When you use a payment app like PhonePe or Google Pay, if you enter a wrong UPI ID, the app will show an error message saying 'Incorrect UPI ID'. This is the app telling you 'what is wrong' with your input, preventing you from sending money to the wrong person. Software engineers constantly look for 'what is wrong' (bugs) in code to make apps work smoothly.

Key Vocabulary

Key Terms

ERROR: A mistake or an incorrect action | MISMATCH: A situation where things do not match or fit together | INCONSISTENCY: A lack of agreement or harmony between things | FLAW: A fault or defect that makes something imperfect

What's Next

What to Learn Next

Now that you can spot what is wrong, you're ready to learn about 'Problem Solving Strategies'. This next step will teach you how to fix those 'wrong' things and find solutions, building on your new skill of identifying errors.