Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 834 · 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? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
2. 2.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
3. 3.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 5 PM
4. 4.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 8 (b) 80 (c) 16 (d) not enough info
5. 5.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) not enough info (b) 60 (c) 6 (d) 12
6. 6.🧩 Kabir bought 6 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) ₹300 (b) ₹55 (c) ₹50 (d) not enough info
7. 7.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
8. 8.🧩 A box has 6 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 36 (b) 12 (c) not enough info (d) 42
9. 9.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
10. 10.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
11. 11.🧩 Nisha is 12 years old. Arjun is older than Nisha. How old is Arjun? (a) 14 (b) 13 (c) 17 (d) not enough info
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
13. 13.🧩 A box has 6 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 49 (b) 13 (c) not enough info (d) 42
14. 14.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
15. 15.🧩 A box has 5 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 9 (b) 24 (c) 20 (d) not enough info
16. 16.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
17. 17.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 6 PM
18. 18.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 7 PM
19. 19.🧩 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
20. 20.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
21. 21.🧩 A box has 5 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 40 (b) 48 (c) not enough info (d) 13
22. 22.🧩 Kabir bought 5 notebooks and a lunch box for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹245 (b) ₹50 (c) ₹250 (d) not enough info
23. 23.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
24. 24.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
25. 25.🧩 Tara is 11 years old. Rohan is 5 years older than Tara. How old is Rohan? (a) not enough info (b) 5 (c) 17 (d) 16
26. 26.🧩 Ishaan bought 6 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹120 (c) not enough info (d) ₹20
27. 27.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
28. 28.🧩 Kabir bought 3 notebooks and a water bottle for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹70 (b) ₹210 (c) ₹207 (d) not enough info
29. 29.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
30. 30.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) not enough info (c) 6 PM (d) 9 PM
31. 31.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
32. 32.🥭 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) no, check more (c) yes, mangoes match (d) yes, it is certain
33. 33.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 7 PM (c) 8 PM (d) not enough info
34. 34.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
35. 35.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
36. 36.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 8 (b) not enough info (c) 16 (d) 80
37. 37.🧩 Saanvi is 11 years old. Tara is older than Saanvi. How old is Tara? (a) not enough info (b) 13 (c) 12 (d) 16
38. 38.🧩 A box has 8 rows of apples, with 9 in each row. How many apples are in the box? (a) 81 (b) 17 (c) 72 (d) not enough info
39. 39.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
40. 40.🧩 Ishaan bought 2 notebooks and a cap for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹100 (b) not enough info (c) ₹98 (d) ₹50

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