Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 998 · 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.🧩 A box has 4 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 30 (b) 10 (c) 24 (d) not enough info
3. 3.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) 70 (c) not enough info (d) 14
4. 4.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
5. 5.🧩 Ishaan bought 6 pens and a bag for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹174 (b) ₹180 (c) not enough info (d) ₹30
6. 6.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
7. 7.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
8. 8.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
9. 9.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
10. 10.🧩 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
11. 11.🧩 Aarav bought 6 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹120 (c) ₹25 (d) ₹20
12. 12.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
15. 15.🧩 Diya bought 2 pens for ₹30 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹20 (c) ₹30 (d) ₹15
16. 16.🧩 Tara bought 6 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹150 (b) not enough info (c) ₹30 (d) ₹25
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
18. 18.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
19. 19.🧩 Aarav is 12 years old. Saanvi is 5 years older than Aarav. How old is Saanvi? (a) 18 (b) 17 (c) not enough info (d) 5
20. 20.🧩 Tara is 9 years old. Vihaan is older than Tara. How old is Vihaan? (a) 14 (b) not enough info (c) 11 (d) 10
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
22. 22.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
23. 23.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
24. 24.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
25. 25.🧩 Kabir bought 3 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹180 (b) ₹65 (c) not enough info (d) ₹60
26. 26.🧩 A box has 3 rows of apples, with 6 in each row. How many apples are in the box? (a) 18 (b) not enough info (c) 24 (d) 9
27. 27.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Meera is 10 years old. Ananya is older than Meera. How old is Ananya? (a) 11 (b) 15 (c) not enough info (d) 12
29. 29.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
30. 30.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
31. 31.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
32. 32.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
33. 33.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
34. 34.🧩 A box has 3 rows of apples, with 4 in each row. How many apples are in the box? (a) 16 (b) not enough info (c) 7 (d) 12
35. 35.🧩 Rohan is 9 years old. Kabir is 8 years older than Rohan. How old is Kabir? (a) not enough info (b) 18 (c) 8 (d) 17
36. 36.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) 8 (c) 80 (d) not enough info
37. 37.🧩 Diya bought 3 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) not enough info (c) ₹150 (d) ₹55
38. 38.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
39. 39.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a guess (d) a loud opinion
40. 40.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs

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