Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 424 · 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.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Kabir bought 3 mangoes for ₹75 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹25 (c) ₹75 (d) ₹30
3. 3.🧩 Vihaan bought 3 mangoes for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹150 (b) not enough info (c) ₹50 (d) ₹55
4. 4.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
6. 6.🧩 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
7. 7.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) not enough info (b) 4 (c) 8 (d) 40
8. 8.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
9. 9.🧩 Ananya is 12 years old. Aarav is 2 years older than Ananya. How old is Aarav? (a) 2 (b) not enough info (c) 15 (d) 14
10. 10.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
11. 11.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 6 PM
12. 12.🥭 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 mango is sweet (c) no, check more (d) yes, it is certain
13. 13.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) that one dog barked (d) never see dogs
14. 14.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
15. 15.🧩 Arjun is 10 years old. Diya is older than Arjun. How old is Diya? (a) 11 (b) 15 (c) 12 (d) not enough info
16. 16.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Nisha bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) not enough info (c) ₹15 (d) ₹30
18. 18.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
19. 19.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
20. 20.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 9 PM (d) 7 PM
21. 21.🧩 Meera bought 6 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹120 (c) not enough info (d) ₹25
22. 22.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
23. 23.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
24. 24.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
25. 25.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
26. 26.🧩 Tara bought 5 markers for ₹250 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹55 (c) ₹50 (d) ₹250
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
28. 28.🧩 A box has 4 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 10 (b) 24 (c) not enough info (d) 30
29. 29.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
30. 30.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
32. 32.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
33. 33.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
34. 34.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a guess (d) a rumour
35. 35.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
36. 36.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
37. 37.🧩 Rohan bought 2 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) not enough info (c) ₹45 (d) ₹80
38. 38.🧩 Aarav is 7 years old. Ishaan is 4 years older than Aarav. How old is Ishaan? (a) 12 (b) 11 (c) not enough info (d) 4
39. 39.🧩 Diya bought 5 kites for ₹175 in all. Each kite cost the same. What did one kite cost? (a) ₹35 (b) not enough info (c) ₹40 (d) ₹175
40. 40.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend

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