Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 860 · 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.🧩 Nisha bought 6 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) not enough info (c) ₹120 (d) ₹20
2. 2.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 9 PM (c) not enough info (d) 10 PM
3. 3.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
4. 4.🧩 Aarav bought 2 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹120 (b) ₹60 (c) not enough info (d) ₹65
5. 5.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 7 PM (c) 3 PM (d) not enough info
6. 6.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
7. 7.🥭 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, it is certain (d) yes, mangoes match
8. 8.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) not enough info (b) 5 (c) 50 (d) 10
9. 9.🧩 Diya is 8 years old. Nisha is 5 years older than Diya. How old is Nisha? (a) 5 (b) 14 (c) 13 (d) not enough info
10. 10.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
11. 11.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
13. 13.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
14. 14.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 8 PM (d) 7 PM
15. 15.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Aarav bought 3 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹10 (b) ₹30 (c) not enough info (d) ₹15
17. 17.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 8 PM (d) 7 PM
18. 18.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
19. 19.🧩 A box has 3 rows of eggs, with 5 in each row. How many eggs are in the box? (a) not enough info (b) 8 (c) 15 (d) 20
20. 20.🧩 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
21. 21.🧩 Diya is 8 years old. Arjun is 2 years older than Diya. How old is Arjun? (a) 10 (b) not enough info (c) 11 (d) 2
22. 22.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
23. 23.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
25. 25.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 9 (b) not enough info (c) 90 (d) 18
26. 26.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
27. 27.🧩 Arjun is 12 years old. Meera is 5 years older than Arjun. How old is Meera? (a) not enough info (b) 5 (c) 17 (d) 18
28. 28.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) all dogs are mean (c) dogs hate you (d) never see dogs
29. 29.🧩 Arjun bought 3 kites for ₹180 in all. Each kite cost the same. What did one kite cost? (a) ₹180 (b) ₹65 (c) not enough info (d) ₹60
30. 30.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
31. 31.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
32. 32.🧩 Vihaan bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹20 (c) ₹30 (d) not enough info
33. 33.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
34. 34.🧩 Diya bought 2 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) not enough info (c) ₹50 (d) ₹90
35. 35.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
36. 36.🧩 Saanvi bought 2 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹50 (c) ₹100 (d) ₹55
37. 37.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
38. 38.🧩 Nisha is 8 years old. Vihaan is 2 years older than Nisha. How old is Vihaan? (a) 2 (b) 10 (c) 11 (d) not enough info
39. 39.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 8 PM (c) 6 PM (d) not enough info
40. 40.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence

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