Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 79 · 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.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
3. 3.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
6. 6.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
7. 7.🥭 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, check more (c) yes, mangoes match (d) no mango is sweet
8. 8.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
9. 9.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) not enough info (c) 70 (d) 7
10. 10.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) 50 (c) not enough info (d) 5
11. 11.🧩 Meera is 11 years old. Ishaan is 7 years older than Meera. How old is Ishaan? (a) 7 (b) not enough info (c) 18 (d) 19
12. 12.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 5 PM
13. 13.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
14. 14.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
16. 16.🧩 Arjun bought 5 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹150 (b) not enough info (c) ₹30 (d) ₹35
17. 17.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
18. 18.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 8 (b) 40 (c) 4 (d) not enough info
19. 19.🧩 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
20. 20.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
21. 21.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
22. 22.🧩 A box has 5 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 14 (b) 45 (c) 54 (d) not enough info
23. 23.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Saanvi is 7 years old. Ishaan is 2 years older than Saanvi. How old is Ishaan? (a) 10 (b) not enough info (c) 2 (d) 9
25. 25.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
26. 26.🧩 Nisha is 12 years old. Kabir is 4 years older than Nisha. How old is Kabir? (a) 4 (b) 16 (c) not enough info (d) 17
27. 27.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
28. 28.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
29. 29.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 2 PM
30. 30.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
31. 31.🧩 Arjun is 12 years old. Nisha is older than Arjun. How old is Nisha? (a) 13 (b) 17 (c) 14 (d) not enough info
32. 32.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 5 PM
33. 33.🧩 Saanvi bought 5 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) ₹65 (b) not enough info (c) ₹60 (d) ₹300
34. 34.🧩 Ishaan bought 5 markers for ₹250 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) not enough info (c) ₹50 (d) ₹250
35. 35.🧩 A box has 3 rows of oranges, with 6 in each row. How many oranges are in the box? (a) not enough info (b) 9 (c) 24 (d) 18
36. 36.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
37. 37.🧩 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
38. 38.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) dogs hate you (d) all dogs are mean
39. 39.🧩 Kabir bought 2 markers and a lunch box for ₹110 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) ₹110 (c) not enough info (d) ₹108
40. 40.🧩 Nisha is 11 years old. Arjun is older than Nisha. How old is Arjun? (a) 12 (b) 13 (c) 16 (d) not enough info

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