Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 931 · 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? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
2. 2.🧩 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
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
4. 4.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) not enough info (b) 50 (c) 5 (d) 10
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.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
7. 7.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Nisha bought 5 mangoes and a cap for ₹275 in all. Each mango cost the same. What did one mango cost? (a) ₹270 (b) not enough info (c) ₹275 (d) ₹55
9. 9.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
10. 10.🧩 A box has 7 rows of eggs, with 6 in each row. How many eggs are in the box? (a) not enough info (b) 13 (c) 48 (d) 42
11. 11.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
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
13. 13.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
15. 15.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
16. 16.🧩 Arjun bought 4 kites and a lunch box for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹76 (b) not enough info (c) ₹20 (d) ₹80
17. 17.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
18. 18.🧩 Meera bought 4 kites and a bag for ₹170 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹166 (c) ₹170 (d) ₹42
19. 19.🥭 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) yes, mangoes match (c) no, check more (d) yes, it is certain
20. 20.🧩 Meera is 9 years old. Nisha is 3 years older than Meera. How old is Nisha? (a) 12 (b) 13 (c) 3 (d) not enough info
21. 21.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
22. 22.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
23. 23.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 6 PM (d) not enough info
24. 24.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
25. 25.🧩 Meera is 7 years old. Vihaan is 3 years older than Meera. How old is Vihaan? (a) 3 (b) not enough info (c) 10 (d) 11
26. 26.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 2 PM (d) 4 PM
27. 27.🧩 Rohan bought 6 pens for ₹360 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹60 (c) ₹65 (d) ₹360
28. 28.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
29. 29.🧩 Meera bought 4 kites for ₹160 in all. Each kite cost the same. What did one kite cost? (a) ₹40 (b) not enough info (c) ₹160 (d) ₹45
30. 30.🧩 Tara is 6 years old. Vihaan is older than Tara. How old is Vihaan? (a) 8 (b) 7 (c) not enough info (d) 11
31. 31.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
32. 32.🧩 Meera is 11 years old. Tara is older than Meera. How old is Tara? (a) not enough info (b) 12 (c) 16 (d) 13
33. 33.🧩 Meera bought 2 notebooks and a cap for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) ₹130 (b) ₹128 (c) not enough info (d) ₹65
34. 34.🧩 Saanvi is 12 years old. Nisha is older than Saanvi. How old is Nisha? (a) 17 (b) 13 (c) 14 (d) not enough info
35. 35.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) 4 (c) 8 (d) not enough info
36. 36.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
37. 37.🧩 Meera is 7 years old. Aarav is 4 years older than Meera. How old is Aarav? (a) 4 (b) 12 (c) not enough info (d) 11
38. 38.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
39. 39.🧩 A box has 7 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 63 (b) 16 (c) 72 (d) not enough info
40. 40.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence

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