Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 419 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 40 (b) 8 (c) 4 (d) not enough info
2. 2.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
4. 4.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) no mango is sweet (d) yes, it is certain
5. 5.🧩 A box has 6 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 10 (b) not enough info (c) 24 (d) 28
6. 6.🧩 A box has 4 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 10 (b) 24 (c) not enough info (d) 30
7. 7.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
8. 8.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 80 (b) not enough info (c) 8 (d) 16
9. 9.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
11. 11.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
13. 13.🧩 Nisha bought 2 markers for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹45 (c) ₹90 (d) not enough info
14. 14.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
15. 15.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 3 PM (d) 5 PM
16. 16.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) facts that support it (d) a guess
17. 17.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
18. 18.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 6 PM (d) not enough info
19. 19.🧩 Arjun is 11 years old. Vihaan is 9 years older than Arjun. How old is Vihaan? (a) 20 (b) 9 (c) 21 (d) not enough info
20. 20.🧩 Aarav bought 2 mangoes and a water bottle for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹80 (b) ₹40 (c) ₹78 (d) not enough info
21. 21.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
22. 22.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
23. 23.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
24. 24.🧩 A box has 6 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 12 (b) 42 (c) not enough info (d) 36
25. 25.🧩 Aarav bought 6 markers for ₹300 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) ₹300 (c) not enough info (d) ₹50
26. 26.🧩 A box has 3 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 12 (b) 36 (c) 27 (d) not enough info
27. 27.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
28. 28.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
29. 29.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) for fun only (d) to change answers
30. 30.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
31. 31.🧩 Ananya is 7 years old. Aarav is older than Ananya. How old is Aarav? (a) 12 (b) not enough info (c) 9 (d) 8
32. 32.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
33. 33.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info
34. 34.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
36. 36.🧩 Diya bought 5 markers and a water bottle for ₹90 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹18 (c) ₹90 (d) ₹85
37. 37.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 8 PM (c) 9 PM (d) not enough info
38. 38.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) not enough info (b) 7 (c) 14 (d) 70
39. 39.🧩 Arjun bought 2 notebooks and a lunch box for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) ₹60 (c) not enough info (d) ₹118
40. 40.🧩 Kabir is 11 years old. Aarav is 4 years older than Kabir. How old is Aarav? (a) not enough info (b) 15 (c) 16 (d) 4

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