Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 280 · 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 eggs has 9 in each row. How many eggs are in the box? (a) not enough info (b) 9 (c) 18 (d) 90
2. 2.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
3. 3.🧩 Nisha bought 6 markers for ₹270 in all. Each marker cost the same. What did one marker cost? (a) ₹270 (b) ₹50 (c) not enough info (d) ₹45
4. 4.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
5. 5.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
6. 6.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
7. 7.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 5 PM
8. 8.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 2 PM (c) 5 PM (d) not enough info
9. 9.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
10. 10.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
12. 12.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
13. 13.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
14. 14.🧩 Vihaan is 12 years old. Tara is older than Vihaan. How old is Tara? (a) 17 (b) not enough info (c) 13 (d) 14
15. 15.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
17. 17.🥭 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) yes, mangoes match (c) no, check more (d) yes, it is certain
18. 18.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 9 PM (c) 6 PM (d) not enough info
19. 19.🧩 Kabir is 10 years old. Saanvi is older than Kabir. How old is Saanvi? (a) not enough info (b) 11 (c) 15 (d) 12
20. 20.🧩 Diya is 6 years old. Saanvi is older than Diya. How old is Saanvi? (a) 7 (b) 8 (c) not enough info (d) 11
21. 21.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Tara is 8 years old. Vihaan is older than Tara. How old is Vihaan? (a) 9 (b) 10 (c) 13 (d) not enough info
23. 23.🧩 Arjun bought 4 pens and a bag for ₹230 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹230 (c) ₹226 (d) ₹57
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
25. 25.🧩 Saanvi bought 4 kites and a water bottle for ₹230 in all. Each kite cost the same. What did one kite cost? (a) ₹230 (b) not enough info (c) ₹57 (d) ₹226
26. 26.🧩 Ishaan bought 6 mangoes for ₹240 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) ₹240 (c) not enough info (d) ₹40
27. 27.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
28. 28.🧩 A box has 6 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 49 (b) 13 (c) not enough info (d) 42
29. 29.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 8 PM (d) 9 PM
30. 30.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 12 (b) 6 (c) not enough info (d) 60
31. 31.🧩 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
32. 32.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
33. 33.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
34. 34.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
36. 36.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) facts that support it (d) a loud opinion
37. 37.🧩 Vihaan is 12 years old. Ananya is 5 years older than Vihaan. How old is Ananya? (a) not enough info (b) 5 (c) 17 (d) 18
38. 38.🧩 A box has 8 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 72 (b) not enough info (c) 16 (d) 64
39. 39.🧩 Aarav bought 6 markers for ₹270 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹45 (c) ₹270 (d) not enough info
40. 40.🧩 Ishaan is 9 years old. Diya is 4 years older than Ishaan. How old is Diya? (a) not enough info (b) 14 (c) 13 (d) 4

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