Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 691 · 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.🧩 Saanvi bought 3 markers and a bag for ₹85 in all. Each marker cost the same. What did one marker cost? (a) ₹28 (b) ₹85 (c) ₹82 (d) not enough info
2. 2.🥭 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
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.🧩 Ishaan bought 4 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹200 (c) ₹55 (d) not enough info
5. 5.🧩 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
6. 6.🧩 Vihaan bought 4 notebooks and a bag for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) ₹106 (b) ₹110 (c) not enough info (d) ₹27
7. 7.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
8. 8.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
9. 9.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 5 PM (c) 3 PM (d) not enough info
10. 10.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) not enough info (d) 8 PM
11. 11.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
12. 12.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
13. 13.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
14. 14.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Saanvi bought 3 balls and a water bottle for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹46 (b) not enough info (c) ₹137 (d) ₹140
16. 16.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
17. 17.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
18. 18.🧩 A box has 7 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 72 (b) 16 (c) 63 (d) not enough info
19. 19.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Ishaan bought 5 notebooks for ₹175 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹175 (c) not enough info (d) ₹35
22. 22.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
23. 23.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
24. 24.🧩 Arjun bought 6 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) ₹300 (b) not enough info (c) ₹55 (d) ₹50
25. 25.🧩 Kabir bought 5 pens for ₹200 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) not enough info (c) ₹40 (d) ₹200
26. 26.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
27. 27.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 60 (b) 12 (c) not enough info (d) 6
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.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 10 (b) 5 (c) not enough info (d) 50
30. 30.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 10 PM (c) not enough info (d) 9 PM
31. 31.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
32. 32.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 9 (b) 90 (c) 18 (d) not enough info
33. 33.🧩 Nisha bought 2 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) not enough info (c) ₹25 (d) ₹20
34. 34.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
35. 35.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
36. 36.🧩 Tara bought 3 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹65 (c) ₹60 (d) ₹180
37. 37.🧩 Aarav bought 3 mangoes for ₹75 in all. Each mango cost the same. What did one mango cost? (a) ₹25 (b) not enough info (c) ₹75 (d) ₹30
38. 38.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 6 (b) 60 (c) 12 (d) not enough info
39. 39.🧩 Ishaan bought 6 kites for ₹180 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹30 (c) ₹180 (d) ₹35
40. 40.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence

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