Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 936 · 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: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
2. 2.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
3. 3.🥭 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) no mango is sweet (c) yes, mangoes match (d) yes, it is certain
4. 4.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 9 (b) not enough info (c) 90 (d) 18
5. 5.🧩 A box has 3 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 8 (b) not enough info (c) 20 (d) 15
6. 6.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
8. 8.🧩 Tara is 7 years old. Kabir is older than Tara. How old is Kabir? (a) 8 (b) 12 (c) 9 (d) not enough info
9. 9.🧩 Ishaan is 10 years old. Rohan is 3 years older than Ishaan. How old is Rohan? (a) 13 (b) 14 (c) 3 (d) not enough info
10. 10.🧩 Nisha bought 6 markers and a water bottle for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹30 (b) not enough info (c) ₹180 (d) ₹174
11. 11.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) not enough info (b) 12 (c) 60 (d) 6
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
14. 14.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
15. 15.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) not enough info (d) 8 PM
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
17. 17.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
18. 18.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 3 PM (d) 4 PM
19. 19.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
20. 20.🧩 Nisha bought 2 pens and a cap for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹138 (b) ₹70 (c) not enough info (d) ₹140
21. 21.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
22. 22.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM
23. 23.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) not enough info (b) 80 (c) 16 (d) 8
24. 24.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
25. 25.🧩 Aarav bought 5 balls for ₹250 in all. Each ball cost the same. What did one ball cost? (a) ₹250 (b) not enough info (c) ₹55 (d) ₹50
26. 26.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 6 PM
27. 27.🧩 Nisha bought 2 notebooks and a lunch box for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹100 (c) ₹98 (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) True (b) False
29. 29.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) not enough info (b) 50 (c) 10 (d) 5
30. 30.🧩 Tara is 11 years old. Arjun is 8 years older than Tara. How old is Arjun? (a) 19 (b) not enough info (c) 20 (d) 8
31. 31.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
32. 32.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
33. 33.🧩 Aarav bought 2 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹35 (b) ₹30 (c) not enough info (d) ₹60
34. 34.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
35. 35.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
36. 36.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
37. 37.🧩 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
38. 38.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
39. 39.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
40. 40.🧩 Kabir bought 4 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹80 (c) not enough info (d) ₹20

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