Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 467 · 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.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) for fun only (d) to change answers
2. 2.🧩 Diya bought 3 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹120 (b) ₹45 (c) not enough info (d) ₹40
3. 3.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
4. 4.🥭 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, it is certain (d) yes, mangoes match
5. 5.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
6. 6.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
7. 7.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
8. 8.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 7 (b) not enough info (c) 14 (d) 70
9. 9.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
10. 10.🧩 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
11. 11.🧩 Vihaan is 7 years old. Meera is 7 years older than Vihaan. How old is Meera? (a) 7 (b) not enough info (c) 14 (d) 15
12. 12.🧩 Rohan is 10 years old. Kabir is older than Rohan. How old is Kabir? (a) 15 (b) 12 (c) 11 (d) not enough info
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
14. 14.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) not enough info (c) 5 PM (d) 9 PM
15. 15.🧩 Ananya bought 2 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹45 (c) ₹90 (d) ₹50
16. 16.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
17. 17.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
18. 18.🧩 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
19. 19.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 8 PM (d) 7 PM
20. 20.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
21. 21.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
23. 23.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
25. 25.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
26. 26.🧩 Kabir is 8 years old. Saanvi is older than Kabir. How old is Saanvi? (a) 13 (b) 10 (c) not enough info (d) 9
27. 27.🧩 A box has 6 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 10 (b) not enough info (c) 28 (d) 24
28. 28.🧩 Tara is 12 years old. Nisha is 3 years older than Tara. How old is Nisha? (a) 3 (b) not enough info (c) 16 (d) 15
29. 29.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
30. 30.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
31. 31.🧩 Vihaan is 6 years old. Tara is older than Vihaan. How old is Tara? (a) 11 (b) 7 (c) 8 (d) not enough info
32. 32.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
33. 33.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) not enough info (b) 9 (c) 90 (d) 18
34. 34.🧩 A box has 6 rows of eggs, with 8 in each row. How many eggs are in the box? (a) not enough info (b) 14 (c) 48 (d) 56
35. 35.🧩 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
36. 36.🧩 A box has 5 rows of oranges, with 5 in each row. How many oranges are in the box? (a) not enough info (b) 30 (c) 10 (d) 25
37. 37.🧩 A box has 5 rows of apples, with 8 in each row. How many apples are in the box? (a) 13 (b) 40 (c) not enough info (d) 48
38. 38.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 6 PM
39. 39.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
40. 40.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

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