Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 769 · 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.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
2. 2.🥭 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) no, check more (d) yes, mangoes match
3. 3.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) the colour of ink (d) your handwriting
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
7. 7.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) not enough info (b) 80 (c) 16 (d) 8
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
9. 9.🐕 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
10. 10.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) not enough info (b) 4 (c) 8 (d) 40
11. 11.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a guess (d) a loud opinion
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
13. 13.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) not enough info (c) 4 (d) 8
14. 14.🧩 Ishaan bought 4 kites for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹140 (b) ₹35 (c) ₹40 (d) not enough info
15. 15.🧩 Meera bought 5 pens for ₹50 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹10 (c) ₹50 (d) not enough info
16. 16.🧩 Tara bought 5 markers for ₹225 in all. Each marker cost the same. What did one marker cost? (a) ₹225 (b) ₹50 (c) ₹45 (d) not enough info
17. 17.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
18. 18.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
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.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 3 PM
21. 21.🧩 Ishaan is 11 years old. Rohan is 2 years older than Ishaan. How old is Rohan? (a) 14 (b) 13 (c) 2 (d) not enough info
22. 22.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
23. 23.🧩 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
24. 24.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 40 (b) 4 (c) 8 (d) not enough info
25. 25.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 7 PM (d) 6 PM
26. 26.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
27. 27.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 10 PM (c) 6 PM (d) not enough info
28. 28.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) 14 (c) not enough info (d) 70
29. 29.🧩 Saanvi bought 2 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) ₹120 (c) ₹60 (d) not enough info
30. 30.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
31. 31.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 6 PM (c) 4 PM (d) not enough info
32. 32.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
33. 33.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 5 PM (c) not enough info (d) 6 PM
34. 34.🧩 Saanvi bought 6 pens for ₹180 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹35 (c) ₹30 (d) ₹180
35. 35.🧩 Rohan bought 6 markers and a lunch box for ₹140 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹23 (c) ₹134 (d) ₹140
36. 36.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
37. 37.🧩 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
38. 38.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
39. 39.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) 16 (c) 80 (d) not enough info
40. 40.🧩 Saanvi bought 3 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹30 (c) not enough info (d) ₹75

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