Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 725 · 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.🧩 A box has 3 rows of oranges, with 4 in each row. How many oranges are in the box? (a) not enough info (b) 12 (c) 7 (d) 16
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
3. 3.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 60 (b) 12 (c) 6 (d) not enough info
4. 4.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
5. 5.🧩 Meera is 9 years old. Kabir is 9 years older than Meera. How old is Kabir? (a) 19 (b) not enough info (c) 9 (d) 18
6. 6.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
7. 7.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
8. 8.🥭 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) no, check more (c) yes, it is certain (d) no mango is sweet
9. 9.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) not enough info (b) 16 (c) 8 (d) 80
10. 10.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
11. 11.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) not enough info (b) 40 (c) 8 (d) 4
12. 12.🧩 Diya bought 4 mangoes and a cap for ₹190 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹186 (c) ₹47 (d) ₹190
13. 13.🧩 Saanvi bought 2 markers for ₹70 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹35 (d) ₹70
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
15. 15.🧩 Ishaan is 11 years old. Meera is 3 years older than Ishaan. How old is Meera? (a) not enough info (b) 15 (c) 3 (d) 14
16. 16.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
17. 17.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
18. 18.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
19. 19.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
20. 20.🧩 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
21. 21.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
22. 22.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
23. 23.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 18 (c) 90 (d) not enough info
24. 24.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
25. 25.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
26. 26.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 18 (b) 90 (c) not enough info (d) 9
27. 27.🧩 A box has 5 rows of eggs, with 9 in each row. How many eggs are in the box? (a) not enough info (b) 54 (c) 45 (d) 14
28. 28.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) facts that support it (d) a loud opinion
29. 29.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) not enough info (b) 14 (c) 7 (d) 70
30. 30.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
31. 31.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
32. 32.🧩 Diya is 9 years old. Nisha is 3 years older than Diya. How old is Nisha? (a) 12 (b) 13 (c) not enough info (d) 3
33. 33.🧩 Ishaan bought 3 pens and a bag for ₹250 in all. Each pen cost the same. What did one pen cost? (a) ₹250 (b) ₹83 (c) ₹247 (d) not enough info
34. 34.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 3 PM (c) 6 PM (d) not enough info
35. 35.🧩 A box has 6 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 24 (b) not enough info (c) 10 (d) 28
36. 36.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 9 PM (c) 7 PM (d) 8 PM
37. 37.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
38. 38.🧩 Aarav bought 4 kites and a water bottle for ₹160 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹40 (c) ₹156 (d) ₹160
39. 39.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
40. 40.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False

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