Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 315 · 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 asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Diya is 8 years old. Arjun is older than Diya. How old is Arjun? (a) 13 (b) 9 (c) not enough info (d) 10
3. 3.🧩 Meera bought 2 balls and a water bottle for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹128 (b) ₹65 (c) ₹130 (d) not enough info
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) that one dog barked (d) all dogs are mean
5. 5.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Ishaan bought 6 markers and a lunch box for ₹260 in all. Each marker cost the same. What did one marker cost? (a) ₹254 (b) ₹260 (c) ₹43 (d) not enough info
7. 7.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 14 (b) 7 (c) 70 (d) not enough info
8. 8.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) not enough info (c) 14 (d) 70
9. 9.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
10. 10.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 4 PM (d) 7 PM
11. 11.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
12. 12.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) 4 PM (d) not enough info
13. 13.🥭 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, mangoes match (c) yes, it is certain (d) no mango is sweet
14. 14.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
16. 16.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Ananya is 12 years old. Rohan is 2 years older than Ananya. How old is Rohan? (a) not enough info (b) 15 (c) 2 (d) 14
18. 18.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
19. 19.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
20. 20.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
21. 21.🧩 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
22. 22.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 9 (b) 90 (c) not enough info (d) 18
23. 23.🧩 Kabir bought 5 markers and a cap for ₹70 in all. Each marker cost the same. What did one marker cost? (a) ₹14 (b) ₹65 (c) not enough info (d) ₹70
24. 24.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 3 PM
25. 25.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
26. 26.🧩 Ishaan is 7 years old. Kabir is older than Ishaan. How old is Kabir? (a) 8 (b) not enough info (c) 12 (d) 9
27. 27.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 9 PM (d) 8 PM
28. 28.🧩 Saanvi bought 6 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹25 (b) ₹120 (c) not enough info (d) ₹20
29. 29.🧩 A box has 3 rows of apples, with 7 in each row. How many apples are in the box? (a) 21 (b) not enough info (c) 28 (d) 10
30. 30.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
31. 31.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 80 (b) 8 (c) not enough info (d) 16
32. 32.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
33. 33.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 7 PM
34. 34.🧩 Saanvi bought 5 balls and a water bottle for ₹270 in all. Each ball cost the same. What did one ball cost? (a) ₹54 (b) not enough info (c) ₹265 (d) ₹270
35. 35.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
36. 36.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 7 PM
37. 37.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Diya is 9 years old. Rohan is older than Diya. How old is Rohan? (a) 10 (b) 14 (c) 11 (d) not enough info
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
40. 40.🧩 Vihaan is 11 years old. Ishaan is 4 years older than Vihaan. How old is Ishaan? (a) 16 (b) not enough info (c) 4 (d) 15

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