Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 766 · 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 bought 6 mangoes and a water bottle for ₹180 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹180 (c) ₹174 (d) ₹30
2. 2.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
3. 3.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
4. 4.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
5. 5.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Meera bought 6 mangoes for ₹240 in all. Each mango cost the same. What did one mango cost? (a) ₹240 (b) ₹45 (c) ₹40 (d) not enough info
7. 7.🧩 A box has 8 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 32 (b) 36 (c) 12 (d) not enough info
8. 8.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
9. 9.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Arjun bought 2 kites and a bag for ₹150 in all. Each kite cost the same. What did one kite cost? (a) ₹148 (b) not enough info (c) ₹150 (d) ₹75
11. 11.🧩 Diya bought 6 notebooks and a lunch box for ₹370 in all. Each notebook cost the same. What did one notebook cost? (a) ₹61 (b) ₹364 (c) not enough info (d) ₹370
12. 12.🧩 Tara bought 5 kites and a water bottle for ₹135 in all. Each kite cost the same. What did one kite cost? (a) ₹130 (b) not enough info (c) ₹27 (d) ₹135
13. 13.🧩 Arjun is 6 years old. Saanvi is 6 years older than Arjun. How old is Saanvi? (a) 12 (b) 13 (c) 6 (d) not enough info
14. 14.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) not enough info (b) 70 (c) 7 (d) 14
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
18. 18.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 3 PM
19. 19.🧩 A box has 5 rows of eggs, with 5 in each row. How many eggs are in the box? (a) not enough info (b) 10 (c) 25 (d) 30
20. 20.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
21. 21.🧩 Aarav bought 2 notebooks and a water bottle for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹105 (c) ₹208 (d) ₹210
22. 22.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 8 (b) not enough info (c) 4 (d) 40
23. 23.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
24. 24.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 2 PM
25. 25.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
27. 27.🧩 Aarav is 7 years old. Vihaan is 3 years older than Aarav. How old is Vihaan? (a) 3 (b) not enough info (c) 11 (d) 10
28. 28.🧩 Aarav is 12 years old. Diya is 5 years older than Aarav. How old is Diya? (a) not enough info (b) 18 (c) 17 (d) 5
29. 29.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
30. 30.🧩 Aarav bought 6 pens for ₹360 in all. Each pen cost the same. What did one pen cost? (a) ₹360 (b) ₹65 (c) not enough info (d) ₹60
31. 31.🧩 Diya bought 4 kites and a cap for ₹280 in all. Each kite cost the same. What did one kite cost? (a) ₹276 (b) ₹280 (c) not enough info (d) ₹70
32. 32.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
34. 34.🧩 A box has 5 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 25 (b) 10 (c) not enough info (d) 30
35. 35.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
36. 36.🧩 Kabir bought 6 markers and a lunch box for ₹330 in all. Each marker cost the same. What did one marker cost? (a) ₹330 (b) ₹324 (c) ₹55 (d) not enough info
37. 37.🥭 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) yes, mangoes match (c) no, check more (d) no mango is sweet
38. 38.🧩 A box has 7 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 13 (b) 42 (c) 48 (d) not enough info
39. 39.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
40. 40.🧩 Diya bought 3 mangoes for ₹135 in all. Each mango cost the same. What did one mango cost? (a) ₹50 (b) ₹45 (c) not enough info (d) ₹135

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