Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 37 · 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? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
2. 2.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 10 (b) 50 (c) not enough info (d) 5
3. 3.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
4. 4.🧩 A box has 4 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 36 (b) 13 (c) 45 (d) not enough info
5. 5.🧩 Diya is 12 years old. Nisha is 4 years older than Diya. How old is Nisha? (a) 17 (b) not enough info (c) 4 (d) 16
6. 6.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
7. 7.🧩 Tara is 9 years old. Kabir is older than Tara. How old is Kabir? (a) 11 (b) 10 (c) 14 (d) not enough info
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
9. 9.🧩 Saanvi bought 2 balls for ₹80 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) ₹80 (c) ₹40 (d) not enough info
10. 10.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
12. 12.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
13. 13.🧩 Rohan bought 6 kites and a water bottle for ₹300 in all. Each kite cost the same. What did one kite cost? (a) ₹50 (b) ₹294 (c) ₹300 (d) not enough info
14. 14.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 70 (b) not enough info (c) 14 (d) 7
15. 15.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) no mango is sweet (d) yes, mangoes match
16. 16.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
18. 18.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
19. 19.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Vihaan bought 4 mangoes for ₹220 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹60 (c) ₹55 (d) ₹220
21. 21.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
22. 22.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
23. 23.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 5 PM
24. 24.🧩 Meera bought 5 notebooks for ₹225 in all. Each notebook cost the same. What did one notebook cost? (a) ₹225 (b) ₹50 (c) not enough info (d) ₹45
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
26. 26.🧩 Rohan is 12 years old. Meera is older than Rohan. How old is Meera? (a) not enough info (b) 13 (c) 14 (d) 17
27. 27.🧩 A box has 6 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 11 (b) 35 (c) not enough info (d) 30
28. 28.🧩 Kabir is 6 years old. Meera is 7 years older than Kabir. How old is Meera? (a) 13 (b) 14 (c) not enough info (d) 7
29. 29.🧩 Aarav bought 4 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹30 (c) ₹100 (d) not enough info
30. 30.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) not enough info (b) 70 (c) 7 (d) 14
31. 31.🧩 A box has 4 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 40 (b) 32 (c) not enough info (d) 12
32. 32.🐕 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
33. 33.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a loud opinion (d) a guess
34. 34.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
35. 35.🧩 Kabir bought 5 notebooks and a water bottle for ₹305 in all. Each notebook cost the same. What did one notebook cost? (a) ₹300 (b) ₹305 (c) ₹61 (d) not enough info
36. 36.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
37. 37.🧩 Saanvi bought 3 markers and a water bottle for ₹95 in all. Each marker cost the same. What did one marker cost? (a) ₹31 (b) ₹92 (c) not enough info (d) ₹95
38. 38.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) not enough info (b) 8 (c) 16 (d) 80
39. 39.🧩 Aarav is 10 years old. Diya is older than Aarav. How old is Diya? (a) 12 (b) 15 (c) not enough info (d) 11
40. 40.🧩 Ishaan bought 2 mangoes and a cap for ₹140 in all. Each mango cost the same. What did one mango cost? (a) ₹140 (b) ₹138 (c) ₹70 (d) not enough info

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