Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 35 · 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.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 90 (b) 18 (c) 9 (d) not enough info
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
3. 3.🥭 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
4. 4.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 8 PM (c) 9 PM (d) not enough info
5. 5.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
6. 6.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 8 (b) 16 (c) 80 (d) not enough info
7. 7.🧩 Kabir is 11 years old. Aarav is older than Kabir. How old is Aarav? (a) 13 (b) 16 (c) 12 (d) not enough info
8. 8.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
9. 9.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 6 PM (c) 5 PM (d) not enough info
10. 10.🧩 Kabir is 7 years old. Aarav is older than Kabir. How old is Aarav? (a) 9 (b) 12 (c) 8 (d) not enough info
11. 11.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
12. 12.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
13. 13.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
14. 14.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 2 PM (c) 6 PM (d) 5 PM
15. 15.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 8 PM
16. 16.🧩 Aarav is 8 years old. Ishaan is 5 years older than Aarav. How old is Ishaan? (a) not enough info (b) 14 (c) 5 (d) 13
17. 17.🧩 A box has 8 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 64 (b) 72 (c) 16 (d) not enough info
18. 18.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a rumour (d) a loud opinion
19. 19.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 9 (b) 25 (c) not enough info (d) 20
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
21. 21.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 4 PM (c) not enough info (d) 6 PM
22. 22.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
23. 23.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
24. 24.🧩 A box has 6 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 42 (b) not enough info (c) 36 (d) 12
25. 25.🧩 A box has 6 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 13 (b) 42 (c) not enough info (d) 49
26. 26.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) 80 (b) 16 (c) 8 (d) not enough info
27. 27.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 10 PM (d) 6 PM
28. 28.🧩 Meera bought 4 pens for ₹140 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹35 (c) ₹140 (d) ₹40
29. 29.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 7 PM
30. 30.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) 7 PM (d) not enough info
31. 31.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 8 PM
32. 32.🧩 Meera bought 5 mangoes for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹25 (b) not enough info (c) ₹100 (d) ₹20
33. 33.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
34. 34.🧩 Kabir is 6 years old. Ishaan is 6 years older than Kabir. How old is Ishaan? (a) 12 (b) 6 (c) not enough info (d) 13
35. 35.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
36. 36.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
37. 37.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 7 PM (c) 8 PM (d) 4 PM
38. 38.🧩 Aarav bought 4 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹20 (c) not enough info (d) ₹80
39. 39.🧩 Vihaan bought 4 balls for ₹80 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹80 (c) ₹25 (d) ₹20
40. 40.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True

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