Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 935 · 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? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Kabir is 6 years old. Ananya is 7 years older than Kabir. How old is Ananya? (a) 13 (b) not enough info (c) 7 (d) 14
3. 3.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
4. 4.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 2 PM
5. 5.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
7. 7.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Kabir is 9 years old. Rohan is older than Kabir. How old is Rohan? (a) 14 (b) 11 (c) 10 (d) not enough info
9. 9.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 8 PM (d) not enough info
10. 10.🧩 A box has 4 rows of guavas, with 9 in each row. How many guavas are in the box? (a) not enough info (b) 13 (c) 45 (d) 36
11. 11.🧩 A box has 6 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 15 (b) not enough info (c) 63 (d) 54
12. 12.🧩 Aarav is 12 years old. Kabir is older than Aarav. How old is Kabir? (a) 14 (b) not enough info (c) 13 (d) 17
13. 13.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
14. 14.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) 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) yes, it is certain (b) no mango is sweet (c) yes, mangoes match (d) no, check more
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
19. 19.🧩 Meera is 7 years old. Tara is 6 years older than Meera. How old is Tara? (a) 13 (b) 6 (c) 14 (d) not enough info
20. 20.🧩 Ishaan bought 4 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) not enough info (c) ₹15 (d) ₹20
21. 21.🧩 Saanvi bought 5 pens and a bag for ₹340 in all. Each pen cost the same. What did one pen cost? (a) ₹335 (b) ₹68 (c) not enough info (d) ₹340
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
23. 23.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
24. 24.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
25. 25.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
26. 26.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
27. 27.🧩 Rohan bought 4 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹25 (b) not enough info (c) ₹30 (d) ₹100
28. 28.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
29. 29.🧩 Vihaan bought 4 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹30 (c) ₹25 (d) ₹100
30. 30.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
31. 31.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
32. 32.🧩 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
33. 33.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
34. 34.🧩 Ananya is 7 years old. Kabir is older than Ananya. How old is Kabir? (a) 8 (b) 9 (c) not enough info (d) 12
35. 35.🧩 A box has 8 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) not enough info (b) 14 (c) 48 (d) 54
36. 36.🧩 A box has 8 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 72 (b) not enough info (c) 16 (d) 64
37. 37.🧩 Rohan bought 4 notebooks for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹160 (b) ₹40 (c) ₹45 (d) not enough info
38. 38.🧩 Arjun is 8 years old. Saanvi is older than Arjun. How old is Saanvi? (a) 9 (b) 13 (c) 10 (d) not enough info
39. 39.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
40. 40.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) not enough info (b) 4 (c) 8 (d) 40

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