Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 95 · 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.🥭 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, check more (c) yes, it is certain (d) no mango is sweet
2. 2.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
3. 3.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
4. 4.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 6 PM
5. 5.🧩 Saanvi is 12 years old. Kabir is older than Saanvi. How old is Kabir? (a) 14 (b) not enough info (c) 13 (d) 17
6. 6.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 9 PM (c) 6 PM (d) not enough info
7. 7.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
8. 8.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Tara is 8 years old. Nisha is older than Tara. How old is Nisha? (a) 10 (b) not enough info (c) 13 (d) 9
10. 10.📊 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
11. 11.🧩 Kabir is 11 years old. Meera is 3 years older than Kabir. How old is Meera? (a) 15 (b) not enough info (c) 3 (d) 14
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
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.🧩 Ishaan bought 4 pens and a cap for ₹190 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹186 (c) ₹190 (d) ₹47
15. 15.🧩 Diya bought 4 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹20 (b) ₹60 (c) ₹15 (d) not enough info
16. 16.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
17. 17.🧩 Saanvi is 7 years old. Ananya is 8 years older than Saanvi. How old is Ananya? (a) 16 (b) not enough info (c) 8 (d) 15
18. 18.🧩 Tara bought 2 pens and a bag for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹88 (c) ₹90 (d) not enough info
19. 19.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) the page number (d) what facts are given
21. 21.🧩 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
22. 22.🧩 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
23. 23.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
24. 24.🧩 Ananya bought 5 balls and a lunch box for ₹145 in all. Each ball cost the same. What did one ball cost? (a) ₹29 (b) not enough info (c) ₹140 (d) ₹145
25. 25.🧩 Arjun bought 5 kites for ₹125 in all. Each kite cost the same. What did one kite cost? (a) ₹25 (b) ₹30 (c) ₹125 (d) not enough info
26. 26.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
28. 28.🧩 Meera bought 3 balls and a water bottle for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹150 (c) ₹147 (d) not enough info
29. 29.🧩 Arjun is 6 years old. Kabir is 8 years older than Arjun. How old is Kabir? (a) 14 (b) 8 (c) 15 (d) not enough info
30. 30.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
31. 31.🧩 Kabir bought 3 markers and a bag for ₹225 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹225 (c) ₹75 (d) ₹222
32. 32.🧩 Vihaan bought 2 notebooks and a lunch box for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹98 (b) not enough info (c) ₹100 (d) ₹50
33. 33.🐕 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
34. 34.🧩 A box has 7 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 32 (b) not enough info (c) 28 (d) 11
35. 35.🧩 Tara bought 4 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹60 (c) ₹15 (d) ₹20
36. 36.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 7 PM (d) 8 PM
37. 37.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
38. 38.🧩 A box has 4 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) not enough info (b) 25 (c) 9 (d) 20
39. 39.🧩 Ishaan is 6 years old. Ananya is 3 years older than Ishaan. How old is Ananya? (a) 3 (b) 9 (c) 10 (d) not enough info
40. 40.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False

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