Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 661 · 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 5 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 24 (b) not enough info (c) 9 (d) 20
2. 2.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 70 (b) 7 (c) 14 (d) not enough info
3. 3.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
4. 4.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
5. 5.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
6. 6.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
9. 9.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
10. 10.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
11. 11.🧩 Tara bought 2 pens for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹55 (c) not enough info (d) ₹110
12. 12.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) not enough info (c) 6 PM (d) 7 PM
13. 13.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
14. 14.🧩 Aarav bought 5 mangoes for ₹225 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹45 (c) ₹225 (d) ₹50
15. 15.🧩 A box has 4 rows of oranges, with 9 in each row. How many oranges are in the box? (a) not enough info (b) 36 (c) 13 (d) 45
16. 16.🧩 Ananya bought 4 notebooks for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹35 (c) ₹40 (d) ₹140
17. 17.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
18. 18.🧩 A box has 3 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 7 (d) 16
19. 19.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
20. 20.🧩 Tara is 8 years old. Nisha is older than Tara. How old is Nisha? (a) not enough info (b) 13 (c) 9 (d) 10
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
22. 22.🧩 Ananya bought 3 markers and a cap for ₹155 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹152 (c) ₹51 (d) ₹155
23. 23.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 7 (b) not enough info (c) 70 (d) 14
24. 24.🥭 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
25. 25.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
26. 26.🧩 Saanvi is 8 years old. Aarav is 2 years older than Saanvi. How old is Aarav? (a) not enough info (b) 10 (c) 2 (d) 11
27. 27.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
28. 28.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 8 PM
29. 29.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
30. 30.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 7 (b) 14 (c) 70 (d) not enough info
31. 31.🧩 Diya bought 5 pens and a water bottle for ₹100 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹100 (c) ₹20 (d) ₹95
32. 32.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
33. 33.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
34. 34.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
35. 35.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
36. 36.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
37. 37.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) not enough info (b) 60 (c) 6 (d) 12
38. 38.🧩 Kabir is 6 years old. Tara is older than Kabir. How old is Tara? (a) 11 (b) not enough info (c) 7 (d) 8
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.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 3 PM (c) 6 PM (d) not enough info

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