Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 718 · 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.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
2. 2.🧩 Aarav bought 2 balls for ₹80 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹45 (c) ₹80 (d) ₹40
3. 3.🧩 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
4. 4.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 7 PM (d) 6 PM
5. 5.🥭 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
6. 6.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
8. 8.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
9. 9.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
10. 10.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
11. 11.🧩 Ananya bought 3 balls and a cap for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) ₹120 (c) ₹117 (d) not enough info
12. 12.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) not enough info (b) 90 (c) 9 (d) 18
13. 13.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Vihaan is 8 years old. Rohan is 6 years older than Vihaan. How old is Rohan? (a) 6 (b) 15 (c) 14 (d) not enough info
15. 15.🧩 Diya is 7 years old. Ananya is 6 years older than Diya. How old is Ananya? (a) 6 (b) 14 (c) not enough info (d) 13
16. 16.🧩 Saanvi bought 2 mangoes and a water bottle for ₹120 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹120 (c) ₹118 (d) ₹60
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
19. 19.🧩 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
20. 20.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 8 (b) 20 (c) not enough info (d) 16
21. 21.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
22. 22.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) facts that support it (d) a loud opinion
23. 23.🧩 A box has 8 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 16 (b) 72 (c) 64 (d) not enough info
24. 24.🧩 Aarav bought 3 balls and a bag for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹57 (c) ₹60 (d) not enough info
25. 25.🧩 Meera bought 4 mangoes for ₹140 in all. Each mango cost the same. What did one mango cost? (a) ₹140 (b) ₹35 (c) ₹40 (d) not enough info
26. 26.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
27. 27.🧩 A box has 8 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 36 (c) 12 (d) 32
28. 28.🧩 Kabir bought 6 kites and a cap for ₹440 in all. Each kite cost the same. What did one kite cost? (a) ₹440 (b) ₹434 (c) ₹73 (d) not enough info
29. 29.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) to waste time (d) for fun only
30. 30.🧩 Aarav bought 5 markers for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹10 (c) not enough info (d) ₹15
31. 31.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
32. 32.🧩 Ananya is 6 years old. Kabir is 6 years older than Ananya. How old is Kabir? (a) 6 (b) 13 (c) not enough info (d) 12
33. 33.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 3 PM
34. 34.🧩 Aarav is 8 years old. Ishaan is older than Aarav. How old is Ishaan? (a) 9 (b) not enough info (c) 13 (d) 10
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
36. 36.🧩 Tara bought 6 balls and a bag for ₹350 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹350 (c) ₹58 (d) ₹344
37. 37.🧩 Kabir bought 4 pens for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹180 (b) ₹45 (c) not enough info (d) ₹50
38. 38.🧩 Diya bought 3 mangoes and a lunch box for ₹95 in all. Each mango cost the same. What did one mango cost? (a) ₹95 (b) ₹92 (c) not enough info (d) ₹31
39. 39.🧩 Diya bought 2 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹60 (c) not enough info (d) ₹35
40. 40.🧩 Arjun bought 5 kites and a cap for ₹115 in all. Each kite cost the same. What did one kite cost? (a) ₹23 (b) ₹110 (c) ₹115 (d) not enough info

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