Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 911 · 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.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking one friend (d) asking your pet
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
5. 5.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, it is certain (d) yes, mangoes match
6. 6.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
7. 7.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
8. 8.🧩 Vihaan bought 4 mangoes and a bag for ₹160 in all. Each mango cost the same. What did one mango cost? (a) ₹160 (b) ₹40 (c) ₹156 (d) not enough info
9. 9.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
10. 10.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) the page number (d) what facts are given
11. 11.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 7 PM
12. 12.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 6 PM
13. 13.🧩 A box has 4 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 32 (b) not enough info (c) 12 (d) 40
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
15. 15.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
16. 16.🧩 Ananya bought 2 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) not enough info (c) ₹30 (d) ₹60
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.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
19. 19.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 16 (b) not enough info (c) 80 (d) 8
20. 20.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
21. 21.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
22. 22.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
23. 23.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
24. 24.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
25. 25.🧩 A box has 3 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 21 (b) 28 (c) 10 (d) not enough info
26. 26.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 6 PM (c) 5 PM (d) not enough info
27. 27.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 32 (c) 12 (d) 36
28. 28.🧩 Saanvi bought 5 notebooks and a lunch box for ₹325 in all. Each notebook cost the same. What did one notebook cost? (a) ₹320 (b) ₹65 (c) ₹325 (d) not enough info
29. 29.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
30. 30.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
31. 31.🧩 A box has 3 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 18 (b) 9 (c) 24 (d) not enough info
32. 32.🧩 Tara bought 4 balls and a cap for ₹240 in all. Each ball cost the same. What did one ball cost? (a) ₹240 (b) ₹60 (c) ₹236 (d) not enough info
33. 33.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 16 (b) not enough info (c) 8 (d) 80
34. 34.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
35. 35.🧩 Diya bought 2 mangoes and a water bottle for ₹50 in all. Each mango cost the same. What did one mango cost? (a) ₹48 (b) not enough info (c) ₹50 (d) ₹25
36. 36.🧩 Kabir is 11 years old. Nisha is 6 years older than Kabir. How old is Nisha? (a) 6 (b) 18 (c) 17 (d) not enough info
37. 37.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
38. 38.🧩 Ananya bought 5 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) ₹200 (b) ₹45 (c) not enough info (d) ₹40
39. 39.🧩 A box has 8 rows of apples, with 7 in each row. How many apples are in the box? (a) 15 (b) not enough info (c) 56 (d) 63
40. 40.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) not enough info (b) 14 (c) 70 (d) 7

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