Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 669 · 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.🧩 Saanvi is 8 years old. Tara is 8 years older than Saanvi. How old is Tara? (a) 17 (b) 8 (c) not enough info (d) 16
2. 2.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
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.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
5. 5.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
6. 6.📊 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
7. 7.🧩 A box has 4 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 16 (b) 8 (c) not enough info (d) 20
8. 8.🧩 A box has 4 rows of guavas, with 8 in each row. How many guavas are in the box? (a) not enough info (b) 12 (c) 40 (d) 32
9. 9.🧩 Rohan is 10 years old. Diya is older than Rohan. How old is Diya? (a) 11 (b) 12 (c) 15 (d) not enough info
10. 10.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
11. 11.🐕 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
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
14. 14.🧩 Diya is 9 years old. Ananya is 8 years older than Diya. How old is Ananya? (a) not enough info (b) 18 (c) 17 (d) 8
15. 15.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
16. 16.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) not enough info (b) 8 PM (c) 5 PM (d) 9 PM
17. 17.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 9 PM
18. 18.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 8 PM (d) 5 PM
19. 19.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
20. 20.🥭 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
21. 21.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
22. 22.🧩 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
23. 23.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
25. 25.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) not enough info (b) 80 (c) 16 (d) 8
26. 26.🧩 Ishaan bought 4 balls and a bag for ₹240 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹236 (c) not enough info (d) ₹240
27. 27.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) not enough info (c) 5 PM (d) 6 PM
28. 28.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
29. 29.🧩 Saanvi bought 2 pens for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹50 (c) ₹90 (d) not enough info
30. 30.🧩 Nisha bought 4 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹120 (b) not enough info (c) ₹30 (d) ₹35
31. 31.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
32. 32.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 40 (b) not enough info (c) 4 (d) 8
33. 33.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
34. 34.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
35. 35.🧩 A box has 4 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 8 (b) 20 (c) 16 (d) not enough info
36. 36.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
37. 37.🧩 Diya bought 6 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹25 (b) ₹120 (c) ₹20 (d) not enough info
38. 38.🧩 Meera bought 6 markers for ₹270 in all. Each marker cost the same. What did one marker cost? (a) ₹270 (b) ₹50 (c) ₹45 (d) not enough info
39. 39.🧩 Saanvi is 8 years old. Meera is older than Saanvi. How old is Meera? (a) 13 (b) 10 (c) 9 (d) not enough info
40. 40.🧩 Rohan bought 6 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) ₹300 (b) ₹55 (c) not enough info (d) ₹50

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