Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 36 · 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.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
2. 2.🧩 A box has 8 rows of apples, with 4 in each row. How many apples are in the box? (a) 36 (b) 12 (c) not enough info (d) 32
3. 3.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
4. 4.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
5. 5.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
6. 6.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
7. 7.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
9. 9.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
10. 10.🧩 Meera bought 3 notebooks for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) ₹75 (b) not enough info (c) ₹25 (d) ₹30
11. 11.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) not enough info (b) 8 (c) 4 (d) 40
12. 12.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
13. 13.🥭 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
14. 14.🧩 Diya bought 2 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹20 (c) ₹25 (d) ₹40
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
16. 16.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) facts that support it (d) a rumour
17. 17.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
18. 18.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
19. 19.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) 6 PM (d) not enough info
20. 20.🧩 Meera is 7 years old. Ananya is older than Meera. How old is Ananya? (a) 8 (b) 9 (c) not enough info (d) 12
21. 21.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
22. 22.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
23. 23.🧩 Aarav bought 6 kites and a lunch box for ₹430 in all. Each kite cost the same. What did one kite cost? (a) ₹71 (b) ₹430 (c) ₹424 (d) not enough info
24. 24.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Tara bought 2 markers and a bag for ₹200 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹200 (c) ₹100 (d) ₹198
26. 26.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 20 (b) not enough info (c) 24 (d) 9
27. 27.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
28. 28.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
29. 29.🧩 Vihaan is 7 years old. Arjun is 8 years older than Vihaan. How old is Arjun? (a) not enough info (b) 8 (c) 16 (d) 15
30. 30.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
31. 31.🧩 Diya bought 2 markers for ₹20 in all. Each marker cost the same. What did one marker cost? (a) ₹20 (b) ₹10 (c) ₹15 (d) not enough info
32. 32.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) not enough info (b) 8 (c) 16 (d) 80
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
34. 34.🧩 Vihaan bought 3 pens for ₹30 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) not enough info (c) ₹30 (d) ₹10
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
36. 36.🧩 Kabir bought 3 balls and a lunch box for ₹220 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹73 (c) ₹217 (d) ₹220
37. 37.🧩 Arjun is 11 years old. Aarav is older than Arjun. How old is Aarav? (a) 13 (b) 12 (c) not enough info (d) 16
38. 38.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 5 PM
39. 39.🧩 Vihaan bought 5 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) ₹300 (b) not enough info (c) ₹60 (d) ₹65
40. 40.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True

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