Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 268 · 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.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) asking one friend (d) guessing
3. 3.🧩 Aarav bought 5 notebooks and a cap for ₹380 in all. Each notebook cost the same. What did one notebook cost? (a) ₹76 (b) ₹375 (c) not enough info (d) ₹380
4. 4.🧩 Arjun is 10 years old. Nisha is older than Arjun. How old is Nisha? (a) 15 (b) 12 (c) 11 (d) not enough info
5. 5.🧩 Vihaan is 11 years old. Saanvi is older than Vihaan. How old is Saanvi? (a) 13 (b) not enough info (c) 12 (d) 16
6. 6.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (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) yes, it is certain (b) yes, mangoes match (c) no, check more (d) no mango is sweet
8. 8.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
9. 9.🧩 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
10. 10.🧩 Aarav bought 3 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹40 (c) ₹45 (d) ₹120
11. 11.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
13. 13.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
15. 15.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) not enough info (b) 14 (c) 7 (d) 70
16. 16.🧩 Nisha bought 4 kites for ₹200 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹50 (c) ₹55 (d) ₹200
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
18. 18.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) not enough info (b) 10 (c) 5 (d) 50
19. 19.🧩 Ishaan is 12 years old. Aarav is older than Ishaan. How old is Aarav? (a) 17 (b) 14 (c) not enough info (d) 13
20. 20.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) 70 (c) not enough info (d) 7
21. 21.🧩 Aarav bought 4 markers for ₹200 in all. Each marker cost the same. What did one marker cost? (a) ₹200 (b) ₹50 (c) not enough info (d) ₹55
22. 22.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 6 PM
23. 23.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
24. 24.🧩 Nisha bought 4 balls and a bag for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹176 (b) ₹180 (c) ₹45 (d) not enough info
25. 25.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
26. 26.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
27. 27.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
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) False (b) True
29. 29.🧩 Nisha bought 2 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹35 (c) ₹30 (d) ₹60
30. 30.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 6 PM
31. 31.🧩 Diya bought 5 pens and a lunch box for ₹320 in all. Each pen cost the same. What did one pen cost? (a) ₹320 (b) ₹315 (c) ₹64 (d) not enough info
32. 32.🧩 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
33. 33.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
34. 34.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) not enough info (c) 4 PM (d) 6 PM
35. 35.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 5 PM (c) 8 PM (d) not enough info
36. 36.🧩 Diya bought 2 balls and a water bottle for ₹100 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹98 (c) ₹50 (d) ₹100
37. 37.🧩 Rohan bought 4 notebooks and a lunch box for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹106 (c) ₹27 (d) ₹110
38. 38.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 80 (b) 8 (c) not enough info (d) 16
39. 39.🧩 A box has 8 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) not enough info (b) 56 (c) 15 (d) 63
40. 40.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False

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