Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 431 · 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.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
3. 3.🧩 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
4. 4.🧩 Aarav bought 2 notebooks and a lunch box for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) not enough info (c) ₹120 (d) ₹118
5. 5.🥭 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, mangoes match (d) yes, it is certain
6. 6.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) 7 PM (d) not enough info
7. 7.🧩 A box has 6 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 56 (b) 14 (c) 48 (d) not enough info
8. 8.🧩 Rohan bought 5 markers for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹10 (b) ₹50 (c) not enough info (d) ₹15
9. 9.🧩 Diya bought 6 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹150 (c) ₹25 (d) ₹30
10. 10.🧩 A box has 4 rows of eggs, with 4 in each row. How many eggs are in the box? (a) not enough info (b) 20 (c) 16 (d) 8
11. 11.🧩 A box has 3 rows of apples, with 7 in each row. How many apples are in the box? (a) not enough info (b) 21 (c) 10 (d) 28
12. 12.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 3 PM
13. 13.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
14. 14.🧩 Vihaan bought 2 kites and a cap for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹100 (b) ₹50 (c) ₹98 (d) not enough info
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
16. 16.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
17. 17.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
18. 18.🧩 Rohan bought 3 pens and a water bottle for ₹165 in all. Each pen cost the same. What did one pen cost? (a) ₹165 (b) not enough info (c) ₹55 (d) ₹162
19. 19.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Tara is 10 years old. Nisha is 8 years older than Tara. How old is Nisha? (a) 18 (b) 8 (c) 19 (d) not enough info
21. 21.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
22. 22.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
23. 23.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
24. 24.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
25. 25.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) to waste time (d) for fun only
26. 26.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
27. 27.🧩 A box has 6 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 10 (c) 28 (d) 24
28. 28.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
29. 29.🧩 Rohan bought 6 notebooks and a lunch box for ₹410 in all. Each notebook cost the same. What did one notebook cost? (a) ₹410 (b) ₹68 (c) ₹404 (d) not enough info
30. 30.🧩 Diya bought 3 notebooks and a water bottle for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹137 (c) ₹46 (d) ₹140
31. 31.🧩 A box has 7 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 56 (b) 14 (c) not enough info (d) 49
32. 32.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
33. 33.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
34. 34.🧩 A box has 4 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 24 (b) 30 (c) 10 (d) not enough info
35. 35.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) that one dog barked (d) all dogs are mean
36. 36.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
37. 37.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
38. 38.🧩 A box has 4 rows of apples, with 6 in each row. How many apples are in the box? (a) 24 (b) 10 (c) 30 (d) not enough info
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
40. 40.🧩 Aarav is 10 years old. Saanvi is older than Aarav. How old is Saanvi? (a) 12 (b) 11 (c) not enough info (d) 15

Free critical thinking lessons, practice and worksheets at talentjr.in/critical-thinking-for-kids