gyankalakumbhKNOWLEDGE. ART. POSSIBILITY.Logic & puzzles • Classes 6–8
How many different lunches?
Count every choice once, without missing a combination.
Take your time. Speak, draw or write your answers.
Here is what is happening.
When each of m first choices can pair with each of n second choices, there are m × n pairs. A table or tree diagram helps avoid omissions and repeated counting. Restrictions can change the total.
Pause. Make the idea your own.
Explain one idea to a partner, draw it or write it in your own words. Which part is an observation, an example or a question?
You can use a home language. No need to share personal experiences or finish everything in one sitting.Your little investigation
What you need
Paper. Imagine two breads and three fillings; no real food is required.
Label breads A and B; fillings 1, 2 and 3.
Write all pairs systematically: A1, A2…
Cross out B3 as unavailable and count again.
With every pairing allowed, how many combinations are there?
KEEP ASKING
All activities in your group Another question is waiting.
Why does a metal spoon feel cooler?
Feeling temperature and measuring it are different things.
~12 minExplore
Keep the recipe in proportion
Double a recipe without changing its balance.
~10 minExplore
Fact, opinion or a question?
Before agreeing with a sentence, find out what kind of claim it makes.
~10 minExplore