Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 882 · 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.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) all dogs are mean (c) never see dogs (d) dogs hate you
2. 2.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
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.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
5. 5.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
6. 6.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
7. 7.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
8. 8.🧩 Ananya bought 6 balls for ₹270 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) not enough info (c) ₹270 (d) ₹50
9. 9.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
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.🧩 Aarav bought 3 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) ₹40 (c) not enough info (d) ₹120
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
13. 13.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) yes, it is certain (c) no, check more (d) no mango is sweet
14. 14.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 3 PM
15. 15.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
16. 16.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM
17. 17.🧩 Ananya bought 2 mangoes for ₹100 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹100 (c) ₹55 (d) ₹50
18. 18.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
19. 19.🧩 Rohan bought 2 kites and a water bottle for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹110 (b) not enough info (c) ₹55 (d) ₹108
20. 20.🧩 A box has 7 rows of guavas, with 8 in each row. How many guavas are in the box? (a) not enough info (b) 15 (c) 64 (d) 56
21. 21.🧩 Arjun is 12 years old. Nisha is older than Arjun. How old is Nisha? (a) 17 (b) 14 (c) 13 (d) not enough info
22. 22.🧩 Meera bought 6 markers and a cap for ₹170 in all. Each marker cost the same. What did one marker cost? (a) ₹170 (b) not enough info (c) ₹164 (d) ₹28
23. 23.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 5 PM (c) 6 PM (d) not enough info
24. 24.🧩 A box has 7 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 13 (b) 42 (c) not enough info (d) 48
25. 25.🧩 Meera is 7 years old. Aarav is 3 years older than Meera. How old is Aarav? (a) 3 (b) 10 (c) not enough info (d) 11
26. 26.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
27. 27.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
29. 29.🧩 A box has 3 rows of apples, with 6 in each row. How many apples are in the box? (a) 18 (b) 24 (c) not enough info (d) 9
30. 30.🧩 Vihaan bought 4 kites and a cap for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹22 (b) ₹90 (c) ₹86 (d) not enough info
31. 31.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 2 PM (c) not enough info (d) 3 PM
32. 32.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
33. 33.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
34. 34.🧩 Vihaan bought 4 notebooks and a water bottle for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹246 (b) ₹62 (c) not enough info (d) ₹250
35. 35.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) 80 (c) 16 (d) not enough info
36. 36.🧩 Diya bought 2 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) not enough info (c) ₹25 (d) ₹40
37. 37.🧩 Tara bought 3 notebooks and a water bottle for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹207 (c) ₹210 (d) ₹70
38. 38.🧩 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
39. 39.🧩 A box has 5 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 12 (b) 42 (c) not enough info (d) 35
40. 40.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False

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