Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 952 · 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.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
3. 3.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
4. 4.🥭 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) yes, it is certain (c) no mango is sweet (d) no, check more
5. 5.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
6. 6.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
7. 7.🧩 Rohan is 9 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 10 (b) 14 (c) 11 (d) not enough info
8. 8.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
9. 9.🧩 A box has 8 rows of guavas, with 4 in each row. How many guavas are in the box? (a) not enough info (b) 36 (c) 12 (d) 32
10. 10.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
11. 11.🧩 Vihaan bought 5 balls and a water bottle for ₹320 in all. Each ball cost the same. What did one ball cost? (a) ₹320 (b) ₹315 (c) ₹64 (d) not enough info
12. 12.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
13. 13.🧩 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
14. 14.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) not enough info (c) 4 (d) 8
15. 15.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
16. 16.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
17. 17.🧩 A box has 7 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 14 (b) not enough info (c) 56 (d) 49
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
19. 19.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
20. 20.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Ishaan bought 2 notebooks for ₹20 in all. Each notebook cost the same. What did one notebook cost? (a) ₹10 (b) not enough info (c) ₹20 (d) ₹15
22. 22.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
23. 23.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 12 (b) 36 (c) not enough info (d) 32
24. 24.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
25. 25.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
26. 26.🧩 A box has 5 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 42 (b) 35 (c) 12 (d) not enough info
27. 27.🧩 A box has 4 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 8 (b) 16 (c) 20 (d) not enough info
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
29. 29.🧩 A box has 5 rows of apples, with 7 in each row. How many apples are in the box? (a) not enough info (b) 42 (c) 12 (d) 35
30. 30.🧩 Kabir bought 4 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹100 (b) ₹30 (c) ₹25 (d) not enough info
31. 31.🧩 Saanvi bought 2 pens and a bag for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹98 (b) ₹50 (c) ₹100 (d) not enough info
32. 32.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
34. 34.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
35. 35.🧩 Tara is 7 years old. Saanvi is 4 years older than Tara. How old is Saanvi? (a) 4 (b) not enough info (c) 11 (d) 12
36. 36.🧩 A box has 8 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 64 (b) 72 (c) not enough info (d) 16
37. 37.🧩 Ananya is 12 years old. Kabir is older than Ananya. How old is Kabir? (a) 13 (b) 14 (c) 17 (d) not enough info
38. 38.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
39. 39.🧩 Meera bought 5 balls and a bag for ₹345 in all. Each ball cost the same. What did one ball cost? (a) ₹69 (b) not enough info (c) ₹345 (d) ₹340
40. 40.🧩 A box has 3 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 12 (b) 27 (c) 36 (d) not enough info

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