Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 40 · 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) no, check more (d) yes, mangoes match
2. 2.🧩 Aarav is 12 years old. Tara is 6 years older than Aarav. How old is Tara? (a) 19 (b) 6 (c) not enough info (d) 18
3. 3.🧩 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
4. 4.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
5. 5.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
6. 6.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
7. 7.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 80 (b) 8 (c) 16 (d) not enough info
8. 8.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
9. 9.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
10. 10.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
11. 11.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
12. 12.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) not enough info (b) 8 (c) 4 (d) 40
13. 13.🧩 Meera bought 3 markers for ₹45 in all. Each marker cost the same. What did one marker cost? (a) ₹20 (b) not enough info (c) ₹45 (d) ₹15
14. 14.🧩 Ishaan bought 3 kites and a lunch box for ₹70 in all. Each kite cost the same. What did one kite cost? (a) ₹70 (b) ₹67 (c) not enough info (d) ₹23
15. 15.🧩 Kabir bought 4 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹10 (b) not enough info (c) ₹15 (d) ₹40
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.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
18. 18.🧩 Tara is 8 years old. Ishaan is 6 years older than Tara. How old is Ishaan? (a) 15 (b) 6 (c) not enough info (d) 14
19. 19.🧩 Diya bought 2 balls and a water bottle for ₹50 in all. Each ball cost the same. What did one ball cost? (a) ₹25 (b) ₹48 (c) not enough info (d) ₹50
20. 20.🧩 Nisha bought 2 markers and a water bottle for ₹40 in all. Each marker cost the same. What did one marker cost? (a) ₹20 (b) not enough info (c) ₹38 (d) ₹40
21. 21.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 7 PM
22. 22.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 9 PM (c) 5 PM (d) not enough info
23. 23.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
24. 24.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 6 PM (c) 4 PM (d) not enough info
25. 25.🧩 Ananya bought 4 pens and a water bottle for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹176 (b) ₹45 (c) ₹180 (d) not enough info
26. 26.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
27. 27.🧩 Saanvi is 9 years old. Kabir is 9 years older than Saanvi. How old is Kabir? (a) 18 (b) not enough info (c) 9 (d) 19
28. 28.🧩 Ishaan bought 3 kites and a water bottle for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹83 (b) ₹247 (c) ₹250 (d) not enough info
29. 29.🧩 A box has 7 rows of apples, with 8 in each row. How many apples are in the box? (a) 64 (b) not enough info (c) 56 (d) 15
30. 30.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) the page number (d) what facts are given
31. 31.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
32. 32.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 3 PM
33. 33.🧩 Diya bought 6 markers and a cap for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹240 (b) ₹234 (c) not enough info (d) ₹40
34. 34.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
35. 35.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
36. 36.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
37. 37.🧩 Arjun is 11 years old. Ishaan is older than Arjun. How old is Ishaan? (a) not enough info (b) 12 (c) 16 (d) 13
38. 38.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
39. 39.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
40. 40.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False

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