Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 496 · 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.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
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.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) not enough info (c) 5 PM (d) 6 PM
4. 4.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
5. 5.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
6. 6.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Aarav bought 2 balls for ₹40 in all. Each ball cost the same. What did one ball cost? (a) ₹25 (b) not enough info (c) ₹20 (d) ₹40
10. 10.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
11. 11.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
12. 12.🧩 Tara is 7 years old. Saanvi is 9 years older than Tara. How old is Saanvi? (a) 9 (b) 16 (c) 17 (d) not enough info
13. 13.🧩 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
14. 14.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 3 PM (d) 2 PM
15. 15.🧩 Arjun is 11 years old. Diya is 3 years older than Arjun. How old is Diya? (a) not enough info (b) 15 (c) 3 (d) 14
16. 16.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
17. 17.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) not enough info (b) 12 (c) 6 (d) 60
18. 18.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
19. 19.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 8 PM (c) not enough info (d) 7 PM
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
21. 21.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
22. 22.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
23. 23.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
24. 24.🧩 Tara is 11 years old. Ishaan is 8 years older than Tara. How old is Ishaan? (a) 8 (b) not enough info (c) 20 (d) 19
25. 25.🧩 Tara is 9 years old. Meera is older than Tara. How old is Meera? (a) 11 (b) 14 (c) 10 (d) not enough info
26. 26.🧩 Tara bought 6 notebooks for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) not enough info (c) ₹35 (d) ₹210
27. 27.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
28. 28.🧩 Rohan is 8 years old. Aarav is 4 years older than Rohan. How old is Aarav? (a) 13 (b) 4 (c) not enough info (d) 12
29. 29.🧩 Ishaan is 6 years old. Vihaan is older than Ishaan. How old is Vihaan? (a) not enough info (b) 8 (c) 7 (d) 11
30. 30.🧩 Kabir bought 4 kites and a water bottle for ₹190 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹190 (c) ₹47 (d) ₹186
31. 31.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
32. 32.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
33. 33.🧩 Diya bought 3 notebooks and a cap for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹33 (b) ₹97 (c) ₹100 (d) not enough info
34. 34.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) yes, mangoes match (d) no, check more
35. 35.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
36. 36.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
37. 37.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
38. 38.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
39. 39.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 8 PM
40. 40.🧩 Ishaan bought 3 kites for ₹45 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) ₹15 (c) not enough info (d) ₹45

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