Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 1 · 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) no, check more (b) yes, mangoes match (c) no mango is sweet (d) yes, it is certain
2. 2.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) what facts are given (d) your handwriting
3. 3.🧩 Aarav bought 2 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹40 (c) ₹25 (d) not enough info
4. 4.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
5. 5.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
6. 6.🧩 Ishaan bought 2 pens for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) not enough info (c) ₹90 (d) ₹45
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
8. 8.🧩 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
9. 9.🧩 Arjun is 11 years old. Kabir is older than Arjun. How old is Kabir? (a) 13 (b) 16 (c) not enough info (d) 12
10. 10.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
11. 11.🧩 Nisha is 7 years old. Ishaan is older than Nisha. How old is Ishaan? (a) 12 (b) 8 (c) not enough info (d) 9
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
13. 13.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
14. 14.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
16. 16.🧩 Rohan is 9 years old. Arjun is 8 years older than Rohan. How old is Arjun? (a) 18 (b) 8 (c) not enough info (d) 17
17. 17.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 10 PM (c) 9 PM (d) not enough info
18. 18.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
19. 19.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
21. 21.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 70 (b) 7 (c) not enough info (d) 14
22. 22.🧩 Ananya bought 3 pens for ₹105 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹35 (c) ₹40 (d) ₹105
23. 23.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 2 PM
24. 24.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
25. 25.🧩 Tara is 9 years old. Diya is 6 years older than Tara. How old is Diya? (a) 16 (b) 6 (c) not enough info (d) 15
26. 26.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
27. 27.🧩 Nisha bought 6 balls for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹25 (b) not enough info (c) ₹150 (d) ₹30
28. 28.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
29. 29.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
30. 30.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
31. 31.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
32. 32.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
33. 33.🧩 Kabir bought 4 notebooks and a water bottle for ₹330 in all. Each notebook cost the same. What did one notebook cost? (a) ₹82 (b) ₹330 (c) ₹326 (d) not enough info
34. 34.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 2 PM
35. 35.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
36. 36.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
37. 37.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 6 PM (d) not enough info
38. 38.🧩 Aarav is 11 years old. Saanvi is older than Aarav. How old is Saanvi? (a) 16 (b) not enough info (c) 13 (d) 12
39. 39.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
40. 40.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 5 PM (c) not enough info (d) 6 PM

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