Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 74 · 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.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) yes, mangoes match (d) no, check more
2. 2.🧩 Vihaan is 11 years old. Diya is older than Vihaan. How old is Diya? (a) 12 (b) 16 (c) 13 (d) not enough info
3. 3.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
4. 4.🧩 A box has 7 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 15 (b) 64 (c) not enough info (d) 56
5. 5.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
6. 6.🧩 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
7. 7.🧩 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
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
9. 9.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 9 PM (d) not enough info
10. 10.🧩 A box has 3 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 27 (d) 36
11. 11.🧩 Meera bought 5 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹100 (c) not enough info (d) ₹25
12. 12.🧩 Vihaan bought 3 kites for ₹135 in all. Each kite cost the same. What did one kite cost? (a) ₹135 (b) not enough info (c) ₹45 (d) ₹50
13. 13.🧩 Saanvi bought 5 notebooks for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹250 (b) ₹50 (c) not enough info (d) ₹55
14. 14.🧩 Diya bought 2 notebooks for ₹20 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹10 (c) ₹20 (d) ₹15
15. 15.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
16. 16.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 8 (b) 40 (c) not enough info (d) 4
17. 17.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
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
19. 19.🧩 A box has 5 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 25 (b) 10 (c) not enough info (d) 30
20. 20.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 3 PM
21. 21.🧩 A box has 7 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 63 (c) 72 (d) 16
22. 22.🧩 Tara bought 5 pens for ₹250 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) ₹50 (c) not enough info (d) ₹250
23. 23.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 8 PM (c) 6 PM (d) 7 PM
24. 24.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
25. 25.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 5 PM
26. 26.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
27. 27.🧩 Kabir is 7 years old. Vihaan is 9 years older than Kabir. How old is Vihaan? (a) 17 (b) 16 (c) not enough info (d) 9
28. 28.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 9 PM (d) 6 PM
29. 29.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
30. 30.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 9 (b) 24 (c) 20 (d) not enough info
31. 31.🧩 A box has 3 rows of apples, with 8 in each row. How many apples are in the box? (a) 32 (b) 11 (c) 24 (d) not enough info
32. 32.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
33. 33.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
34. 34.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) not enough info (b) 3 PM (c) 6 PM (d) 7 PM
35. 35.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
36. 36.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
37. 37.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 20 (b) 16 (c) not enough info (d) 8
38. 38.🧩 A box has 5 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 30 (b) 36 (c) not enough info (d) 11
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.🧩 Kabir is 10 years old. Diya is older than Kabir. How old is Diya? (a) not enough info (b) 15 (c) 12 (d) 11

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