Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 94 · 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 measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
2. 2.🧩 Arjun bought 6 markers for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹240 (b) ₹45 (c) ₹40 (d) not enough info
3. 3.🥭 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
4. 4.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
5. 5.🧩 Arjun is 11 years old. Aarav is 3 years older than Arjun. How old is Aarav? (a) not enough info (b) 15 (c) 14 (d) 3
6. 6.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 10 PM (c) not enough info (d) 9 PM
7. 7.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a guess (d) a loud opinion
8. 8.🧩 Nisha bought 2 balls and a water bottle for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) not enough info (c) ₹90 (d) ₹88
9. 9.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
10. 10.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 20 (b) 16 (c) not enough info (d) 8
11. 11.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) all dogs are mean (d) dogs hate you
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
13. 13.🧩 A box has 3 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 36 (b) 12 (c) 27 (d) not enough info
14. 14.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
15. 15.🧩 A box has 8 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 56 (b) 63 (c) 15 (d) not enough info
16. 16.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
18. 18.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
19. 19.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
20. 20.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
21. 21.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
22. 22.🧩 A box has 4 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 10 (b) 30 (c) 24 (d) not enough info
23. 23.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
24. 24.🧩 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
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
26. 26.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
27. 27.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
28. 28.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
29. 29.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
30. 30.🧩 A box has 5 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 54 (b) 14 (c) 45 (d) not enough info
31. 31.🧩 Diya is 11 years old. Nisha is 9 years older than Diya. How old is Nisha? (a) 20 (b) 9 (c) not enough info (d) 21
32. 32.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 3 PM (d) not enough info
33. 33.🧩 Tara is 12 years old. Saanvi is older than Tara. How old is Saanvi? (a) 13 (b) 14 (c) not enough info (d) 17
34. 34.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
35. 35.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
37. 37.🧩 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
38. 38.🧩 A box has 6 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 42 (c) 36 (d) 12
39. 39.🧩 A box has 6 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 24 (b) 28 (c) not enough info (d) 10
40. 40.🧩 Arjun bought 4 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹20 (c) ₹15 (d) not enough info

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