Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 29 · 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.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
2. 2.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
3. 3.🧩 Saanvi bought 6 markers for ₹330 in all. Each marker cost the same. What did one marker cost? (a) ₹330 (b) ₹60 (c) not enough info (d) ₹55
4. 4.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
5. 5.🥭 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
6. 6.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) not enough info (b) 12 (c) 6 (d) 60
7. 7.🧩 Rohan is 8 years old. Vihaan is older than Rohan. How old is Vihaan? (a) not enough info (b) 13 (c) 9 (d) 10
8. 8.🧩 A box has 3 rows of apples, with 9 in each row. How many apples are in the box? (a) 36 (b) 27 (c) 12 (d) not enough info
9. 9.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
10. 10.🧩 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
11. 11.🧩 Meera bought 2 markers for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹30 (b) not enough info (c) ₹25 (d) ₹50
12. 12.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
13. 13.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
14. 14.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
15. 15.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
16. 16.🧩 Vihaan bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹40 (c) ₹20 (d) not enough info
17. 17.🧩 Nisha bought 5 pens and a lunch box for ₹265 in all. Each pen cost the same. What did one pen cost? (a) ₹53 (b) ₹260 (c) not enough info (d) ₹265
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
19. 19.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
20. 20.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
21. 21.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
22. 22.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
23. 23.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking the whole class (d) asking your pet
24. 24.🧩 Kabir bought 6 mangoes and a cap for ₹330 in all. Each mango cost the same. What did one mango cost? (a) ₹55 (b) ₹330 (c) not enough info (d) ₹324
25. 25.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 9 PM (c) not enough info (d) 8 PM
26. 26.🧩 Arjun bought 6 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹25 (c) ₹20 (d) ₹120
27. 27.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) never see dogs (d) all dogs are mean
28. 28.🧩 Kabir bought 5 markers and a cap for ₹285 in all. Each marker cost the same. What did one marker cost? (a) ₹280 (b) ₹57 (c) ₹285 (d) not enough info
29. 29.🧩 A box has 7 rows of eggs, with 4 in each row. How many eggs are in the box? (a) not enough info (b) 28 (c) 32 (d) 11
30. 30.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 6 PM (d) 9 PM
31. 31.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
32. 32.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
33. 33.🧩 Arjun bought 3 kites and a water bottle for ₹200 in all. Each kite cost the same. What did one kite cost? (a) ₹197 (b) not enough info (c) ₹200 (d) ₹66
34. 34.🧩 A box has 7 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 56 (b) 49 (c) not enough info (d) 14
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
36. 36.🧩 Arjun is 7 years old. Meera is 9 years older than Arjun. How old is Meera? (a) 16 (b) not enough info (c) 17 (d) 9
37. 37.🧩 Meera bought 3 mangoes for ₹180 in all. Each mango cost the same. What did one mango cost? (a) ₹180 (b) ₹65 (c) ₹60 (d) not enough info
38. 38.🧩 A box has 7 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 11 (b) 28 (c) 32 (d) not enough info
39. 39.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
40. 40.🧩 Kabir is 9 years old. Rohan is 6 years older than Kabir. How old is Rohan? (a) 6 (b) 15 (c) 16 (d) not enough info

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