Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 12 · 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) enough evidence (b) not enough evidence
2. 2.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
3. 3.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
5. 5.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
6. 6.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
7. 7.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
8. 8.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 9 PM
9. 9.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) that one dog barked (d) dogs hate you
10. 10.🧩 Vihaan is 12 years old. Nisha is 4 years older than Vihaan. How old is Nisha? (a) 16 (b) not enough info (c) 17 (d) 4
11. 11.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
12. 12.🧩 A box has 5 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 30 (b) 36 (c) not enough info (d) 11
13. 13.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
14. 14.🧩 Ananya is 7 years old. Rohan is 6 years older than Ananya. How old is Rohan? (a) not enough info (b) 13 (c) 14 (d) 6
15. 15.🧩 Arjun is 12 years old. Diya is older than Arjun. How old is Diya? (a) not enough info (b) 17 (c) 13 (d) 14
16. 16.🧩 Meera is 11 years old. Aarav is 4 years older than Meera. How old is Aarav? (a) 16 (b) not enough info (c) 4 (d) 15
17. 17.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 8 (b) not enough info (c) 4 (d) 40
18. 18.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 50 (b) 10 (c) not enough info (d) 5
19. 19.🧩 Ishaan is 9 years old. Arjun is 6 years older than Ishaan. How old is Arjun? (a) 16 (b) not enough info (c) 6 (d) 15
20. 20.🧩 Vihaan bought 4 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) ₹60 (c) ₹20 (d) not enough info
21. 21.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
22. 22.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) not enough info (b) 8 PM (c) 5 PM (d) 9 PM
23. 23.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
24. 24.🧩 Kabir is 8 years old. Meera is 6 years older than Kabir. How old is Meera? (a) 14 (b) 15 (c) 6 (d) not enough info
25. 25.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
26. 26.🧩 Kabir bought 5 notebooks for ₹50 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹10 (c) ₹50 (d) not enough info
27. 27.🥭 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 mango is sweet (d) no, check more
28. 28.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
29. 29.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Kabir bought 4 pens and a bag for ₹130 in all. Each pen cost the same. What did one pen cost? (a) ₹130 (b) ₹126 (c) ₹32 (d) not enough info
31. 31.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
32. 32.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 50 (b) not enough info (c) 5 (d) 10
33. 33.🧩 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
34. 34.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 6 PM (c) 5 PM (d) not enough info
35. 35.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
36. 36.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 18 (b) not enough info (c) 9 (d) 90
37. 37.🧩 Nisha is 7 years old. Vihaan is older than Nisha. How old is Vihaan? (a) not enough info (b) 12 (c) 8 (d) 9
38. 38.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
39. 39.🧩 Nisha bought 2 mangoes and a lunch box for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹78 (b) ₹80 (c) not enough info (d) ₹40
40. 40.🧩 Ananya bought 3 notebooks for ₹45 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹45 (c) not enough info (d) ₹20

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